They have even asked if materials or work vehicles would be stored or left at the property.  

I have used Appliance smart and the big box stores (Lowes, Home Depot) with success.

You can save all your lists again for easy access (although I would save all the criteria on a separate doc stored on your computer or cloud service just in case listsource.com wants to burn all their paying customers again). 

The Bigger Pockets book store if full of great books: https://www.biggerpockets.com/store

The Bigger Pockets book store if full of great books: https://www.biggerpockets.com/store

The Bigger Pockets book store if full of great books: https://www.biggerpockets.com/store

The Bigger Pockets book store if full of great books: https://www.biggerpockets.com/store

However, if you think about it, it takes 5 minutes at any major store to get a duplicate key made even if they turn them all in.I would go ahead and buy the locks that can be rekeyed by inserting a tool and a new key.

You don't have to deal with leaky toilets, or evict people because they are paying for an area to store items. 

I am reviewing a NNN seller lease back property, seller is a local title lender with 11 retail stores in business since 2004.What are the main things i need to be concerned and looking for, he is offering 10 cap.