Even if it's cleaning rooms, get a feel for the operations.

They must first move out, leave the property broom-cleaned, and then they can pick up the funds at our attorney's office.Most won't agree to all this - so they are liars.

I would consider getting out of property management and getting into cleaning IF you think they are doing better than you . 

Because Airbnb only makes money when the guest books on Airbnb.Hence, they want the price to be cheapest on their platform, so people book on Airbnb instead of elsewhere, and want their properties to be able to compete with hotel prices (even after cleaning fee and service fees). 

That hard work includes making the investments that the current owner hasn't made (nicer kitchens, new flooring, fresh coat of paint, etc.), removing tenants and marketing to new tenants.

The timeline is years for clean up and decades for reconstruction and recovery.

Floor plans?

Upgrades include a fully remodeled kitchen, renovated bathrooms, new durable flooring, contemporary fixtures, and efficient heating and cooling systems.

I would just excavate a few 2'x2'x2' (or larger if possible) spot footings, w rebar and Simpson hardware,under the house (you will want to take up the floor to make this easier to do).

I'm fine with doing some minor fixes and improvements to a property: Adding overhead lighting/fans, better flooring, maybe redoing a main bathroom.