~15 Player-Sized FFA Shooter Map (very simple interiors)

I need an advanced builder to create these two FFA maps for a shooter game I'm working on. It should be sized for around 15 players and look just like these two images. The maps should also have simple backgrounds as seen in the images so they aren't just floating. This job should be completed within a week or so. Simple interiors on all the houses as well, but obviously well put together.