<prompt> Human: Im 23, married no kids, making 35-40,000 depending on overtime. My income is our only source right now but my wife plans to get a part time job once she receives her work permit and can begin school. Living in a relatively low COL area in the southeast. Were both in good health. Rent with a room mate.My mother is 54, an RN making around 62,000 a year. Not sure where she is on debts and savings but for sure better now than she was a couple years ago. Also in good health overall. Rents a house for herself.We started throwing the idea of going in with my mom and purchasing a duplex together, with her living on one side and us living on the other. My thinking is that this benefits everyone because with our combined household incomes we would hope to have the house paid off by the time my mother retires at 67, giving her a secure and paid off living space to retire in, and setting me and my wife up to own it as a paid off rental property after my mom passes away. We have a very good relationship with my mom and want to make sure she is taken care of in retirement, because she hasnt done much of anything to plan for it so either way its going to fall on me as her only child as it is. Am I missing something here? In my head this seems too perfect an idea and I feel like theres a critical issue thats not popping up. I appreciate any help I can get!  <response>: How much is the duplex?How much do you have saved up?How is your relationship with your mother?Are you planning on kids anytime soon?How does your wife feel?Most people are going to be overly cautious in this thread and need all the details before making an informed decision to help you. I would just say think very hard before jumping into this. We dont need to know all of your personal details, but you need to know how this is going to affect you for the next 13 years.From the outside looking in, knowing costs in the south, a 225k duplex, avoiding PMI with the 20 down payment 45k, you would be splitting costs at about 850 a month 15 yr mortgage not including maintenance. You both can afford that on your current salaries, but the real question is your relationship handle such a situation?I know I wouldnt be able to do it, because my mom is one to point out when Im doing wrong, whether shes out of line or not. But some people have different relationships with their parents. I would DEFINITELY make sure my wife was on board 100. Happy wife, happy life makes a lot of sense to me, not because Im worried about her complaining, but because Im not happy seeing my wife unhappy, and vice versa. Just be sure is all Im saying. 