I would check and see if this is something your bank offers, or alternatively a lot of PM software has the ability to do it for a small fee too. 

As an alternative, I am requesting contractors to sign hold harmless and release of liability agreements.

Not saying it cant be done or you shouldnt, just dont bank on it being a cheaper alternative. 

Alternatively, set aside one or two boxes of things that family might want that you can offer for anyone to go through....believe me, it will save you some grief in the long term with your family.  

I've gotten consistent dump truck/trailer loads of scrap stone pieces (for fill) from the counter guys at times, just make sure to insist they leave out the trash.  

Alternatively, you could use other assets as collateral

As an alternative, I am requesting contractors to sign hold harmless and release of liability agreements.  

If you look at some of them, there isn't enough room to pull it out of the space, remember these things are like 70 feet long and you have to factor in the truck too.If the new site doesn't have a pad you will need to do that.

In addition, as a learning experience they can try alternate rent models such as rent by room, STR, MTR. 

Are you just considering a bunch of alternatives?