That babysitter is an employee.In the end if they -employee or contractor-- get hurt, they will likely sue you and say it is your fault--uneven ground, tripped on a hole, something making you negligent.If you do decide to go the paperwork route, just request their SSN and 1099 them for what you pay them,  That is the only paperwork that would stand up in court. 

What is tripping you up?

@Chaim KernkrautUnless you are a real estate investor with more than 10 years of experience, a team of contractors, legal aides and RE agents who have done deals with you for the same amount of years, I would suggest you take a weekend trip to see the property at least once.

If there's potential that they'll work with you, then a trip to the local building permit office would be in order.  

You'll also discuss with them your "trip wires" for notification.

I will stay at the airbnb at least once (probably more) to come behind and check that everything was properly taken care of, but I can't make that trip constantly.

It'll likely be cheaper then repair by time you add in trip cost, parts, and labor.

Hmmm, yes I’m aware that families save on trips by just renting an entire house. 

After that, I kept my expenses lower than my income, reduced my workload to human levels, took many small trips, several large trips and cared for my grandparents until their passing. 

January has been mostly long weekends with a couple of midweek trips.