I love this idea and would support you all the way if you can find a way to get a bank to loan you guys money. A lot of people here are speaking out of fear but houses do appreciate in long run so all those fear of hidden cost are none sense, especially it’s not a side business, it is a necessity for you (you need a place to stay). Do get a lawyer too to draft out the contract, it’s like a prenup for marriage, just in case of anything like agreeing the exact time period to sell, how to split extra fee, everyone’s time commitment on miscellaneous… etc. 100% you won’t regret this if you decide to buy a house together.