( difficulty reselling the unit, and it has a small percentage risk on your health)I would like to know if the value of the condo will decrease overtime and your thoughts about the situation.

Without knowing the total picture (goals, income needs, tax bracket, heirs, health and so on) the seller could put together a properly structured long term lease option, that should do the trick.

In jurisdictions with applicable short-term rental laws, government officials can use the City Portal to search for listings in their registration system and take action on listings they determine violate local regulations.”From:https://news.airbnb.com/new-city-portal-features-to-help-gov... 

In the 1930s lead pipes were supplanted by copper as people realized lead was unsafe.The use of lead wasn't officially stopped until 1986 by the Safe Drinking Water Act Amendments.Also, up until 1986, many homes were still using lead-based solder on copper pipes. 

Ideally Health & Safety or Rents & Profits in CA, TX, AZ, NV.Thanks in advance!

They have SCAD, Memorial Health University, and the new Enmarket Arena that's gonna bring more than ample traffic year-round.

There are health and safety concerns for both gas and electric ranges.

@Maya JonesI don't think an official letter from the vacating tenants is necessary.

Health insurance premiums are going up significantly.  

With the BRRRR the one major piece of advice I will give you is that AC's city officials and building department are notorious for screwing with you.