I was thinking about a very user-friendly wizard to get started, not everyone has a need for a full model, for instance those living in flats don’t need unnecessary levels with floors and so on. So there would be a series of questions like:
- do you live in a house, or a flat, or a duplex?
- how many floors do you have?
- describe for each floor which rooms apply to them
- do you have outside areas, like a garden or a garage/carport?
- check the outside areas that apply to you
- any additional buildings like a shed or guest house?
etc.