OP, I agree, therapeutic camps' costs are absolutely crazy. We tried one a few years ago, ended up being w/o any vacation that summer, DS didn't see a grain of sand. Now we rely on ESY at schools that incorporates social skills into its daily curriculum and some of the camps through Fairfax County Parks and Recreation. They are a lot cheaper than Leaps and Bounds or LAB for that matter. Look into
https://www.fairfaxcounty.gov/ncs_tracers/up/ProgramListing.aspx?pDGID=2#3