(Given they had a big enough portfolio in the state to warrant an entirely new entity.

We've actually had this happen more than once.I've been called so many times for deceased tenants, search warrants, domestic violence, meter reader heard water running inside a vacant house, smell of gas, and so many other things I can't remember.With renters, it's important to set boundaries.

The building we bought in was non-warrantable, so lending was a bit trickier but still found 30 year financing.

You will typically only get 75% LTV thoughIf say it was a non- warrantable condo though it would be limited to 65% LTV on either a purchase or refi for some lenders.

It's totally worth it in my opinion.If it ends up needing more attention from the plumber and say the plumber finds something stuck in the pipe, that is a different issue and would warrant the tenant possibly being financially responsible.

Additionally I may know my contractors do a B job not A job, so I know my product always sells lower and warrants a lower ARV.

If it was a burglar or vandalism, does their renter's insurance cover the damage (assuming the cost is high enough to warrant a claim)?

I'd go with rocks due to my concern with poo but I have no experience so this may not be warranted.   

An inspector can only enter your property with your permission or with a search warrant.

Plumber yes ....structural engineer - maybe ..if its  warranted  by some major issue or  concern