Makes sense with the cars. Im slowly researching finishing out a 9 ft crawl space with a radiant floating slab.... but am definitely going to get the barrier in there.... no wet cars to worry about, and lots of moisture surrounding I want to keep out....
regarding your water tank crapping out...
Why are you regretting putting the vapor barrier down before the insulation? Just because of the hassle?
I wouldnt think that it would be contributing to your humidity issues... in fact, the only thing it would do is assist by preventing additional moisture from coming up from beneath the...