General Growth Properties is by virtue of its size a sort of regional urban planning group, albeit a commercial one. It's largely responsible for the direction of our region's most famous planned city, Columbia. It also owns several other malls and mixed-use projects.
There are few actual municipalities in Maryland: Most of the government is county-based. A few exceptions include Annapolis, Bowie, Baltimore (city) ... I'm relatively new to the area, so I don't know many of them. The counties around Baltimore are Howard, Baltimore County, Harford and Anne Arundel. PG is a bit farther away.
Within Baltimore, there may be neighborhood organizations that can pay something -- though probably not as much as you'd need.
Other overlay organizations like the MTA may also be able to use you.
Good luck!