The big issue here tends to be that they can feel like they need special treatment. 

Each adult would have received thousands in stimulus money, possibly even thousands more in unemployment on top of any drug sale profits. 

You could do the obvious here and invest the funds into your local drug trade, your overhead is already covered with the glock and many syndication offers will come your way.

Could the drug paraphernalia cause her to lose the voucher?

Except in the simplest of situations, you will have to pay a securities attorney to draw up a Private Placement Memorandum, Subscription Agreement, Accredited Investor Verification form, and to offer an opinion as to compliance with securities laws and regulations.Over funding a transaction by 2/3, completing the purchase, and then giving money back to an investor who wants out before the sale is complete and before other investors are paid is known as preferential treatment, is illegal unless ALL investors agree to it in writing, and is a non defensible accusation should any of the remaining investors decide to sue you.  

I've found that in Arizona, the older homes from the 1950's were treated with DDT and termite treatment isn't always necessary.

What if a couple of gangs decided that the boarded up houses two streets over look like great territory to setup a drug house inviting far more crime to your area?

Mom was a rescue diver and Dad was a drug interdiction chief.

Yet you can't adjust that one (well, sort of by playing with what % is land vs. property value)Also, if I'm being honest, us in RE have such unfair tax treatment (by unfair I mean unfair advantages).   

If sponsors are aggressive on rent growth, expenses should be given similar treatment.