I think marriage is far and away the worst thing to happen to women and I don't think it's a feminist thing to do. If you want to buy a house together, buy a house together, do it as equal partners. You don't have to stand in a white dress, agree to change your surname, piss about doing all these things 'wives' are supposed to do or declare anything in front of the state/big beardy sky lord. I'd argue that by 'becoming a wife' you're buying into a world view where exploitation of the status quo is a) more likely and b) socially reinforced.

Buy a house. Two adults. If you decided to sell it. Sell it. If you decide to sell your half, sell your half. Or get him to buy you out. Or rent it to him for a fixed fee. Consider the insidiousness of the phrase 'the benefits of a wife' and how loaded that is. The significant other penguin and I have been together a decade and neither of us believes marriage is a good thing for individuals or society in general - don't mind other people getting married, but insisting on marriage is the feminist equivalent of insisting on being punched in the face before a fight starts because you want to get used to how it feels.