Has anybody ever tried putting a track in a cave? You can get office space in the caves around here
for $3.10/sqft/year (that's all inclusive). I don't know how that measures up to the cost of warehouse space, or if they'd allow a track, but the local paintball and laser tag places use it and seem to do just fine.
Thankfully, we have a nice local facility, but if something were ever to go awry, it might be interesting to look into the "member supported" / hobby shop supported idea like the R/C Ottawa guys are doing.