If cracked, combustion vapors will get blown into home circulating air, like if a radiator has a leak the fluid will spray out slowly, right. 

Smoking is considered cigarettes, cigars, pipes, hookahs, water pipes, vapes, e-cigarettes, and any other like kind instrument that produces smoke or vapor, regardless of whether tobacco or other consumables are used.

If you meant $1700 with interest and taxes, her balance after 3 years and 6 months would be $161839.62. 

Some products have started to have cupping of the planks when installed over concrete without the use of a vapor barrier.

People who put on their own roofs, fix a plumbing leak, paint their house, or take herbal supplements for an ailment are basically taking responsibility for the job they are doing.

If you have any good general contractor recommendations please do let me know. will also need help with crawl space and vapor barrier and structural issues.Thanks in advance 

If it's in the floor tiles, best bet would be leave it in place and go over with a gokd vapor barrier followed by a vinyl plank floor.

The footers of the house are CMU block and filled in with concrete, no footer below the cmu block, just SP2.Notice that brick goes all the way up, no footer or brick ledge only sitting on sp2, has 1 tie in 16" up from the sp2 and up the wall..nothing to hold the brick courses in place, not to mention missing water proofing/vapor barrier.

Same way or inside shower surround except there it will get a poly vapor barrier behind concrete board,,,and ditra waterproof liner OVER the concrete board before tile install.

I'm wondering if anyone has installed vinyl plank flooring with a good (not too expensive) vapor barrier that they can recommend?