<prompt> Human: Im 33yo. I currently have a mortgage now under my name for my familys house. However in a year well be selling it and Ill be moving out, and my parents will be moving out. Once I sell the house, Ill have enough equity in it for a down payment on smaller place just for me. Option 1. My situation is that Im currently unmarried but in a prospective long term relationship, but who knows really. My ideal plan is to sell my current house and move out in 2019, rent with the gf for a year, get married then buy a place together in 2020-21 under dual income. PROS: second income for downpayment, i dont have to save as much from now until 2020-21CONS: rentingOption 2. However, Im also thinking what if the relationship doesnt work out I know I shouldnt be thinking so negatively but Im curious as I dont have the best track record for dating. So I was thinking buying my own place in 2019 with doctor sibling as co signer, instead of renting, when I sell this current house. Then the gf moves in, we get married. If the relationship doesnt work out or if we divorce then at least Ill still have the house to myself. PROS: house just under my name CONS: single income for downpayment, need to save moreOption 3. Gf and I move into current house, stay here until married. Qualify for the 500k married capital gains tax exclusion rather than 250k for single for the 420k in capital gains, sell place in 2020-21 then move out and buy a place together. This seems to be the most financial reasonable choice. PROS: save money from renting for a year, pay no capital gains tax as a married coupleCONS:But would my then wife in a way inherit half of the 420k of my house that Ive had?  <response>: Rent for at least a few years if you can. You guys are only together 4 months... that isnt a long term relationship at all and jumping into a long term agreement can seriously screw you up.Also, new house can be crazy amount of stress on a new relationship. Focus on enjoying your relationship, find a nice place to rent and just live life.Oh, and keep your finances separate until after you get married!ps: you guys have like 9 years to have kids. Her age matters, yours doesnt and shes only 31. Take your time, you really dont want 18 years of child support because you jumped into something. 