If you dated somebody long enough to think about moving in together how would you do it maybe?

Depends on the situation... each situation is different. In the ideal world, it's just as simple as planning for 2 people - but reality often means that there's elderly parents or children to consider, too.

We sold her place and she moved into mine.

They have always moved into my place

Depends on how cute her butt is.

Depends on money