Personally, I believe you've set yourself a "minimum 10% acceptable" trap, because it's now tending to became your default (barely 10%) decision-maker!?

There are standard procedures and traps you won't be familiar with.Also, there would be absolutely no advantage to not using one, even if you didn't need one.

That's the trap that investors fall into is: there is a threshold as to how much you can handle because you manage the properties yourself.  

Breach of warranty of habitability - tenant's remedies(1) If there is a breach of the warranty of habitability as set forth in section 38-12-503 (2), the following provisions shall apply:(a) Upon no less than ten and no more than thirty days written notice to the landlord specifying the condition alleged to breach the warranty of habitability and giving the landlord five business days from the receipt of the written notice to remedy the breach, a tenant may terminate the rental agreement by surrendering possession of the dwelling unit.

This resulted in a rodent being trapped in the wall and possibly died.

He said putting down bait traps is best because roaches take the bait back to their colony.

Also stupidly enough fell into a trap of a guru who hasn't helped me close a deal in a whole year after a lot of money.

They are built in sections ("modules") in a factory in controlled conditions (no rain, sleet, wind, sun, etc.).

I've also started replacing all carpet with fake hardwood, it's durable and doesn't need to be cleaned or trap urine like carpet does.

A Protected Tenant is a tenant who has continuously resided in a rental unit for at least ten years, and is either: (i) 62 years of age or older OR (ii) disabled as defined in Title 42 United States Code Section 423 or handicapped as defined in Section 50072 of the California Health and Safety Code.