I've got the common sense items such as clean the lint trap, report leaks ect.

Airbnb algorithm is a mystery somewhat - but the algo does factor your cleaning fee, cancellation policy, review score, and more when factoring visibility.

Charge the old tenant for cleaning and repairs, unpaid rent, and other expenses.

and there's cleaning, carpet, painting, patching.

When you first approach the homeowners about helping them out of their property, you'll want to let them know that you aren't going to save their mortgage you're just trying to give them a clean escape from having that defaulted mortgage on their credit.

Or my power equipments or tools, or any of my belongings missing? 

LOC's can have negative effects on your future purchasing power if not set up correctly and keeping in mind you can "never" use an LOC as a reserve or asset.It will always be a debt burden and can over inflate your back end debt ratios depending on the W2 income and your liabilities.

Under this idea, you'd need to see if the Health dept has any restrictions for your septic system (which i assume you have) and if the power company would meter the 2nd unit separately. 

Wholesaler had it for $90k "as-is", another wholesaler bought it, cleaned it out, and relisted it for $120k.

Storm sewer, storm pond, sewer lines, water access, fire hydrants, public bathrooms, surface coverage, sidewalk or bike paths, setbacks, power lines and right of ways known and unknown, road access, etc. 5.