New roof and a company is coming in to install a radon mitigation system so the basement is getting a vapor barrier installed all before I even close on the house. other than that we are looking at about a 50k rehab, ARV is at 90k. 

I don't have experience with tenants vaping but I do know that the vapor smell dissipates in seconds once it is in the air.

The plastic is called a Vapor Barrier. 

My inspector was in the crawlspace and noted no vapor barrier or insulation under the house. 

You can buy great looking laminate at $1-2sqft at Lowes, plus underlayment (definitely install underlayment/vapor barrier, it helps with the water problem and also helps the floor absorb minor leveling imperfections).   

Recommend professional evaluation and repair which may include perimeter drainage and sump pump, sealing the gaps around the main drain, and adding New Vapor barrier and insulation.

"Dabs are concentrated doses of cannabis that are made by extracting THC and other cannabinoids using a solvent like butane or carbon dioxide, resulting in sticky oils also commonly referred to as wax, shatter, budder, and butane hash oil (BHO).

If you take 2005's M-3 compare it against the true capital, there is a multiple of 33 to 1 of "vapor paper" to real money.

It went from "vapor" to "paper" now back to "vapor".

Managing water and water vapor is a huge part of home design and building science.