It looks like the kind of house I'd want to visit!
The biggest mapping time-sink for Starlight is the main star city. It's the largest of areas you will get to visit, and thus has all kinds of homes, shops and other interesting areas. It's also the first area you visit at the beginning of the game, so it has to be finished before I can move onto other areas. Phew! It's going to be so much work!
I'm going to try the new thing of mapping non-puzzle/exploration areas first and making the events, cutscenes and puzzle areas as I progress with the game.