Of course, the tile and sheetrock were ripped out, vapor barrier, backer board installed, new tile properly laid and grouted. 

We've brought in two dehumidifiers which are helping, but I'm not sure what the root problem is or even who to ask for help.One contractor said moisture is coming through a hole in the exterior stucco, but another said no way because the vapor barrier would block it. 1st one recommended installing insulation, but I've also read this can increase condensation problems.

The vapors from those chemicals probably is harmful.

We moved all of it, put a vapor barrier down and vinyled the whole house.

Wood would be a bit cheaper but it should have a vapor barrier over it before the stucco is applied, unlike block.If you ever need to run additional wires, cables, plumbing, etc., it's nice to have wood walls rather than block.There are plenty of wood frame homes down here.  

Carpet/pad/install for me is about $3.50/ft with rem pack carpet, but I get high end pad with vapor barrier for my rentals. 

Then lay you're vapor barrier on top of that, followed by the floor covering itself. 

Wear a respirator with organic vapor cartridges as you apply it.

- No electrical conduit or splits, just the main panel- Turned up sprinkler heads- No HVAC - No partitions walls (potentially drywall at the demised perimeter wall and the firewall)- No store fronts glazing (unless township requires it)- No slab (stone only and vapor barrier)- No plumbing (stubbed within 5')- No toilet rooms= $65.00 - $70.00 / SQFTAre you doing the retail leases as Vanilla Shells (VS)?

Starting with the slab, it does not usually have a vapor barrier or the correct PSI concrete.