CONGRATULATIONS - it really all is in the past now. Deep breaths, some celebration and then onward and forward.
In my last house, which was a mid- terrace 1930's house. I had the loft done so that g.children could sleep up there, but that was just shut off most of the time. Small bedroom was my office, so I had my own bedroom and a good sized spare double room. Ground floor was open plan, through lounge, long galley kichen running direct from entrance hallway. I did have a small utility room built at end of that.
For years, one of my daughters kept telling me that the house was MUCH too big for me. I pointed out that with the exception of that loft bedroom, I lived in ALL of the rest each day, However, she was adament .......this was from about ten years ago, even when I was still in employment!!!
Children = even highly intelligent adult ones, do see things in very different ways.
Shandy, your daughter is doing her own thing - hopefully right for her. You need to take that on board and do your own thing - with a lot more experience to know what is going to be right for you. Believe me, she will come round in due course, and feel rather silly at her attitude now.