I don't know if you've ever been to Flag Raiders back when it was in Cambridge, but I always highly enjoyed their Saigon map. It's about a dozen small plywood buildings simulating a built up area. No building permit required, unlike the double storied structure Drug Lab was. If you do enough planning, you can add a few building each year and end up with a full-sized town inside your 50 acres.
"The Bird of Hermes is My Name, Eating My Wings to Make Me Tame."