<prompt> Human: Im confusing myself trying to figure it out. So Im renting at a lower than market rate and saving around 20k a year. I am looking at ways to make money. Lets make up some numbers. Apartment for 200k. I have 50k in the bank. I know tax is only deductible from the interest. So is it the same thing that I just save 20k a year and buy a place in 10 years for cash and pay tax on the rental profits from then on... Or does it make more sense to buy now with a mortgage and pay less tax on profits because I can use the interest on the mortgage against it? And if it is, is it better to have a longer mortgage as opposed to paying off the mortgage as quick as possible?  <response>: Go to biggerpockets.com and ask again. Any answers will be 1000 times better and with much more follow up info. I could say more but most things I have learned from over there and they are smarter than me anyways so just go learn from the experts. 