Any lightweight interior rooms that fit together?

Hi guys,
I'm currently trying to get a whole modern looking "house" set up by having all the rooms you could need (not all at once of course).
But this has a few big issues: most of the rooms that get sold separately don't really fit together thematically and the Products that are a whole house most of the time are either huge and take ages to render or are just small and empty.

So now I wanted to ask if you know any places where I can get a few rooms that thematically fit together nicely and are on the "more or less easy to render" side of things.