So step 1 is figure out what you want to invest inStep 2 is to grill the sponsor on questions.

Using Minut (great for noise monitoring but undecided on cigarette-smoking as the 3 sets of guests it called out- 2 were iffy/possible and 1 insists no smoking but they grilled so more testing is in order still).

I've already been down that road with pot smokers. 

Add a Smart TV or a Roku device to the list, along with a charcoal grill.  99% of my renters are guys with a high school education making around $2500/week. 

If it's not specifically written in law that you can't do something, then you can.I learned that when I was creating my lease and had a question regarding smokers.

This family is currently searching for a home, and our agent, who also represents them, has generously offered to waive any commission for connecting us.After outlining our standard tenant qualifications—which encompass application requirements, income verification, rental history, credit score, background checks, a non-smoker policy, occupancy guidelines, pet policy, application fees, and move-in costs—our agent indicated that the extensive discussions and adherence to these requirements "equals a full commission of one month's rent."

Min Requirements:-Non-Smoker-Income must exceed 3x monthly rent-Min credit score 600-No evictions or unpaid judgements from previous landlords -Background check will be conducted on all applicants over 18-No more than two pets (dogs and cats) allowed.

are the people in the unit inside outside or non-smokers?...

No pet, non smoker.   

Enough that we sold the home without it being a smoker house.Today, I will be trying out an even more powerful machine in a mobile home we are renovating that smells like the worst smoke smell you can imagine.