Not trying to knock on anyone's plans, but if folks are coming in from out of town, Alexandria is a better tourist attraction, IMO. We have Old Town, great restaurants, the Potomac River where folks can take a boat ride to Mt Vernon, monuments, etc., and it's just minutes to DC, and has public transportation. Not that a shed and fellowship isn't enough to make a trip worthwhile.........
I'd be happy to lend my space, but not a whole lotta room to jam. But, I can set up a drumkit, keys and some amps in the lesson room. I might be able to fit a small PA. But not as much room as a church.
Just throwin it out there.