New insight

Figuring out how to sanitize the water system(s) has surfaced something I didn't think about when I was considering buying an RV.  

It's one thing to find a place to store it.  It's another to find a place to do maintenance and repair work.  Maybe plumbing is uniquely messy: I could probably drain clean water into the dirt of the place where it's stored.  I surely couldn't do this parked at my townhome complex. The HOA patrol would have a conniption fit.  They don't like seeing it parked there.  

Back at the storage lot,  there's no source of water to flush out the system.  

Hmmm ...