<prompt> Human: I see a lot of people talking about the hidden expenses of buying a home. While many things in life are uncertain, you can still plan for the most common scenarios. Ill be listing big ticket items below that a lot of people dont budget for, the average cost, and the average life expectancy. A house is likely the most expensive purchase you will ever make so you want to do your research before hand. Two things to note before I begin:1. Unexpected things can happen no matter how well you plan. My 17 year old tree got knocked down during a windstorm 2 weeks after I bought my house. My fence was fairly new and should have had a decade left in it, but trees are bigger than fences. As Mr. Gump once said, shit happens.2. These prices ALL vary massively. I aggregated averages from various sites, but just because the median price is 7500 doesnt mean you wont be paying between 2k and 30k. Ill explain what to look for cost wise for each item, but remember that every scenario is unique so you need to do research for your specific circumstance. Now lets get started.RoofThis is the most expensive one for most people. The average cost of a roof is 7500 dollars. The average life expectancy is 20 years. This varies greatly based on the material it is made out of, the size, and the climate you are in. The best way to get the most out of your roof is to keep it clean of things like moss build-up. I bought a 17 year old home. If the roof was the original Id be looking at a huge cost in the not so distant future. Luckily mine was almost brand new, which is a sigh of relief for any homeowner.FurnaceThe average cost of a furnace is 3000 dollars. The average life expectancy is 18 years. This varies based on the brand you have and the climate you are in. The best way to get the most out of your furnace is to change filters on time and not use it when its not needed. Unlike my roof, my furnace was an original with the house. Knowing it was on its last years of life I upped my emergency fund by a few thousand dollars for when the sucker died. RIP 2016, made it 21 years!Central AirThe average cost of a central air unit is 4000 dollars. The average life expectancy is 18 years. This varies based on the brand you have, the size, and the climate you are in. Someone buying a unit for a 1200sq foot home in Maine is naturally going to spend less than someone buying for a 2500 sq foot home in Arizona. Assuming people in Maine even have them? The best way to get the most out of your AC is to not use it when its not needed. I had same story with AC unit as Furnace. They died about 6 months apart, but since Id been planning for that for a few years it wasnt too devastating of a hit to me.Wood FenceThe average cost of a wooden fence is 25 dollars per sq ft. The average life expectancy is 12 years. This quite a bit based on the material you use and the climate. Also if you dont like wood the cost for other materials will change a lot. This is the first item on the list that I will say you can save money on by doing the labor yourself. Without expertise you dont want to mess with building a roof or installing an AC or furnace. Fences arent that bad though if youre relatively handy and you can cut the cost on half.WasherDryerThe average cost of a Washers and Dryers is 500 dollars each. The average life expectancy is 10 years. This varies based on the brand and size. If you want a behemoth washer that is also basically a computer youll be paying a lot more than a normal sized with with 2 knobs on it for heat and time. Make sure to clear the damn lint trap for your dryer!FridgeThe average cost of a refrigerator is 1100 dollars. The average life expectancy is 14 years. This varies based on the brand and size. Barring something obvious like leaving it open for 16 weeks in a row there isnt really a way to keep it alive longer. Just make sure you go catch it if its running.Deck RepairThe average cost of deck repair is 1500. The average life expectancy is 15 years. This varies based on the size of the deck and the extent of repairs needed. This is also one that you can save a lot of money if you do it yourself. As for a new deck... youll have to price that out yourself because it has a wider range than pretty much any of the other items based on size and materials.Sprinkler SystemThe average cost of a new sprinkler system is 3000. The average life expectancy is 15 years if you dont go cheapo. This varies based on the size of the yard, climate, and how many installations you want. Repairs to a system can be 100-1000 dollars based on what is damage and where.Hot Water HeaterLast item! The average cost of a hot water heater is 1500 dollars. The average life expectancy is 10 years. This varies based on the brand and size. A good way to expand the life of a hot water heater is to not drive your car into it like my cousin once did. He did it to his own, not mine thankfully.ConclusionSo, these are all the items my realtor ran through with me. Hope it helps at least someone out there!In the 8 years Ive been here Ive had expected replacements to Hot Water, AC, furnace, Washer, and Dryer. Ive had unexpected replacements to the fence. Everything else is still within its normal life span so this list has been great for me minus one stupid wind storm.  <response>: Think you meant 25 a linear foot, not square foot for a fence. Per square foot would be.. interesting.. Ive got 325 feet of 6 foot high staggered privacy fence, and I know thats not nearly 50k to replace. :Also, the water heater either varies a lot by area, or youre averaging in some tankless units. Paid 1400 Canadian for my 50 gallon power vent last year, and that included replacing all the venting with S636, otherwise it would have been about 200 cheaper. Your water type and how often you do maintenance on it makes a huge difference.. around here 15 years or more is average before it finally leaks.My washer and dryer are both about 15 years old, my fridge 18. Fridge is finally becoming a problem, not for the mechanicals, but for the fact that everything is plastic inside, and is becoming brittle.. Currently have a 12x1 piece of wood holding up the lower shelf, expecting worse to happen over the next couple years. Wife wants a new side by side, Im too stubborn to let that happen yet. : 