Marijuana causes just as much damage as cigarettes and vaping has chemicals that stick around too. 

If there really are wasps, they must go.Having a nest on your property is different from having it on a neighbors property, or a random wasp flying around.If you send out wasp removers, and they find no nest, or its on a neighbors property---can you by your lease charge the renter for the service (if not maybe have him show you with a pic where its at--sometimes they go into a crack in the siding and you cannot see the nest.The rude behavior stuff--If it were me, I'd put my foot down and tell him to behave in a businesslike manner when he speaks to me (you might be able to just not renew his lease if you want).If it were mine, the door replacement timing is none of his business--he gets a new door when I decide he does.If it were mine, the mold thing--at least he cleaned it up--even f it was imaginary (or very slight)--no reimbursement for mask or chemicals...unless its in the lease.Good Luck!

I have good credit and have experience managing employees in the petro/chemical field.

We had a Chemical Engineer from somewhere in Africa.

I saved two, thankfully.You can get a chemical, I forget the name, and put it in the pool so when the kids (or adults) pee it will turn BLUE and they are SOOO busted!

It is reasonable to ask your tenant to dip out leaves from the skimmer and pool but use a pool service for everything else, including chemical maintenance and equipment.

What do you use to test the hot tub for safety and to adjust any chemical levels? 

The problem with our city is that the local chemical & energy industry has diminished over the last 10 years going off shore. 

I'm considering buy some property near a new chemical plant construction site and turning it into an RV park to house the construction workers.

Keep in mind, if you keep it as a car wash biz, that revenue should cover costs of water, electricity, chemicals, etc as well as the building maintenance.