They even used up all the hot water in a 75 gallon tank (the other unit was on vacation) one weekend.  

I wouldn't be.Btw, it seems that everyone likes to get their investing education from the TV show Shark Tank these days. 

Obviously major repairs like septic tanks, roofs, and the works we quote and wait for approval.

Are the POH on individual septic tanks?

There are also a lot of sharks in both industries.  

What appears to be a water heater tank is in the yard.

Someone dropped a toilet tank on the floor and cracked two irreplaceable tiles.

I also don't like the smell, nor want the liability of toxoplasmosis.If it's your niche to offer carpeted rentals to tenants with pets, you might want to put a non-permeable layer between the carpet and the subfloor next time you replace the carpets, or require tenants train their cats with CitiKitty (Shark Tank)

They had no problem walking away when the market tanked, too, usually with plenty of work that needed to be done and month or two of unpaid rent.As far as finding an investor to put down cash to finance something like that at a high LTV, I doubt you are going to have many takers.

Fish tanks can break and ruin flooring, ferret's attract roaches, cats spray, etc.).