<prompt> Human: Hello! I hope to make this brief for everyone.My fiancee and I have put an offer on a house, which they countered at 540,000 so the ball is in our court, we have until Wednesday to decide. Together before tax we make 120,000. We know that purchasing the house is a bit of a stretch, so lets just get that out of the way.Currently we are renting a room very close to the house for 1000. We are capable of paying for the house though itll be tight without any roommates or anything but we plan on renting out 3 of the 5 rooms. This particular house, due to the school district, location to jobs and what not would be a house we would live in permanently. We wouldnt sell the house for 30 years at least, unless theres like a disaster or something.Anyway, we were looking at mortgage tax deductions and a bank rate calculator said that we would save about 7,000. Does that mean we would get a tax return of 7,000 back, in addition to what we normally get now?I do welcome anyone to talk us out of it. However, if you try keep in mind that we would be living here for at least 25 years and its a super tight market Boston.  <response>: Youre looking at a house that is 4.5 times your annual income. That is definitely a stretch, especially when you factor in property taxes, insurance, and the costs of upkeep. Roofs leak, water heaters and air conditioners die. If its going to be tight then youre not leaving enough room to cover the unexpected disasters that will eventually happen. Meanwhile you should not count on rental income to pay your bills. Renters can suck, and eviction can be a time consuming process. Sharing a roof and living spaces with someone that youre actively battling in court as you try to take away the roof over your head can be awkward to say the least. Meanwhile you should keep in mind whether or not youll still need a roommate 5 years down the line when youre ready for kids. 