Now if you have a vapor barrier this can be reduced down to 1 sq ft of ventilation per 1500 sq ft of building area per 1203.3.2 exception 2. 

If the tenants start growing herbal products for example then you have the data from the utility and can have them "true up" if their use is excessive.As far as the capital expense part goes, zero down loans are literally that.

I was wondering myself.I also wanted to ask a related question... do the vapors from the vape products cause any odors, discoloration, issues, to a home?

It’s a block house with plaster directly applied to the block, no vapor barrier, no framing and no drywall.

No vapor barrier so moisture is present 100%.

I want to buy all the income I can.the expansion of the real cash and the "vapor paper" is what troubles me the most.

Especially anything main floor where you don't necessarily need a water vapor protected like you would put in a basement. 

Proper skirting, venting, and vapor barriers will minimize movement.

The pieces interlock, are placed over a pad and/or vapor barrier and require a smooth, solid surface below for support.

Plus her values have risen to the $350,000 range with her balances around $135-150,000 now and she is no longer cash flowing.