Or she starts dating a guy with a dog-sitting or weed growing or meth cooking business who does damage to the house.

I’m new to house flipping but have extensive experience as the owner of a successful property damage restoration company.

I have talked to OOS investors that lost big doing single family turnkey rentals in recent years because the "great tenant" that came with the house moved out mid lease and did $30k of damage on exit.What I believe you are really going after is: don't be dumb money.  

This would mean your class of tenant causes more damage than expected, or hail destroys your roof *every 5 years* or something similar.

I fixed the roof myself out of my own pocket.I called the insurance broker  and he straight asked me if there was a damage after the hurricaine, so I said a tree fell but I fixed it myself out of my own pocket.

Also there are rules with past due notices etc. as well as it relates to this.If you were to damage someone's credit and then find out you were not compliant, you could open yourself to a lengthy and very costly legal battle. 

the kitchen,fridge and bathrooms are disgusting and it is damaging the properties.

Our counsel previously advised we are legally entitled to a greater amount including all lost rent until the home was re-signed, cost of lock-out, cost to clean up house, physical damage, ect.For context, this is a solid house in a decent neighborhood and we never had prior issues with the tenant. 

Most people taking in foster children are good, honest people that will take responsibility for any damage done.

I was worried about it, but so far no damage or stains and we allow dogs.