The problem is that all the commercial real estate has clauses that you can tack missing rent onto the end of the contract but lower rent adjusts the basis so you have to cough up cash.

This means that it is almost always better to have an empty space than an occupied one that you lowered the rent on--I've seen quite a bit of commercial real estate unoccupied for going on 5+ years now.

This merry-go-round will continue until everything crashes simultaneously.