Faced with the same sitch as you after getting the house, i am going with your option 1 after some time in the house to reflect. I need to do some work to get that done though. It sounds like your D's biggest issues is that she wants her own room which would apply in a smaller house as well. Involving the kiddo in the house selection would be a fun thing as well.
Option 2 requires the most interaction and negotiation with the W. For me, i would avoid it, but you sound like you have a better talking relationship with your W than i (me and the W don't talk at all except for issues related to the children)
You can still do option 3 more financially responsible in option 1
Me 51, Wife 44; Married 4; Together 10; HSD20, XWSD13, XWSS14, XWSS17 Kids Together D4, D1.52 W Moves Out: 03/16/17 W Files : 03/17/17 D Final: 10/23/17