They "what if" it to death and allow the fear of failure to prevent them from ever entering the game.

Including one that prevents a unit from being rented for less than 6 days. 

Also I don't think it's that clear that any of these tactics would actually prevent the bank from enforcing the due on sale. 

Restrictions are placed to prevent potential buyers from acquiring those properties before they are disposed of by banks.

I keep mine a little below market to prevent turnover.  

We anchored the top of the machine to the wall to prevent it from tipping over.

Clay soils mean that drainage is really important to prevent foundation issues.

I only give them a short time (usually 5 days total from the contract to hold) to meet for the lease signing before they lose their exclusive rights to the unit, so this prevents someone from dragging their feet after they've signed the contract to hold.Once the lease is signed, I take down the ads and send out emails to people in mid-marketing flow letting them know that the apartment has been rented but I will reach out if something falls through.

Having a strong understanding of your "walk away" price (maximum you're willing to pay) gives you leverage and prevents emotional decisions. 

Next steps are to put down a roll of plastic to prevent moisture or wet floors.