Basically my idea is to have the map be a construction site.
The map would look like a landscape view of a house showing two sides and the roof.
The different trades working on the house would be bonus areas. For instance having all the sections of 'Roofing' area would give you the corresponding bonus. Same would apply for having 'Carpenters' areas or 'Painters' areas and so on.
Aside from the main house there would also be a Parking Lot area where you would get an extra bonus for having the Parking Space for your trade as well. All spaces would connect to each other and the Driveway.
Hopefully someone has some fun with this idea
Albro