-No smoking, to include cigarettes, pipes, cigars, or any other tobacco smoking material, and/or vapor like products is allowed within the structure of the building; including the rental unit, basement, or garage, either by the Tenants or their guests.

An old garage slab will not have the correct steel, concrete PSI, or vapor barrier that is required nowadays.

Crawl space: have a vapor barrier and ventilation and no standing water (gutters and grading)Attics: no roof leaks and ventilationBasements: sump pumps are good and keep water away (gutters and grading) I don't love finished basements because you can't see if walls are taking in water.

Originally posted by Herb Daly Jr: In my state what we do is use a nominee trust and the home is placed in the trust.

3) Are insulation rolls with vapor barriors the most ecomical way to go?

Let her be the shining star and you be the worker bee.  

You ALWAYS - no matter the floor want to put a vapor barrier between the underlayment and the floor material. 

Otherwise, it's a "harmless" water vapor not FDA regulated way of taking in flavored nicotine. 

I love Gardening (Organic), I grow medicinal herbs and make teas, Beekeeping (we just started back after my husband lost his hives several years ago); Nature Photography, Antiquing and Flea Markets (Pre-Covid we were planning to drive around the country going to different flea markets and antique fairs in our vintage Airstream; but those plans are on hold), Tai-Chi (Love it!)

This reminds me why I do not do residential anymore for investing and only commercial.Had my fill of nut ball tenants and not looking to re-experience that anytime soon.The carpets you can put in a vapor barrier between carpet and padding where it will usually keep from getting to the subfloor.