I'd gauge the useful remaining life on the units and proceed accordingly.

For the stolen light bulbs, I have replaced them with the Cree led light bulbs ( if they can somehow remain in the unit, they tend to look like a regular light bulb and  last awhile and they don't make a humming noise).

I typically write mine for 1 year so I dont have to continue to keep getting them over and over to remain legal, but I write them to be terminable with a short amount of notice.

If there is not lease break provision, then they're liable for the remaining period of the lease.

The only option we have to make the deal go through is to turn in the car and pay the remaining payments plus lease termination fee.

Generally there is not additional funds required to assume a loan beyond traditional closing cost but the seller would revive any proceeds above and beyond the remaining loan. 

Trying to get myself out of paralysis mode, I think this is a good deal but I am worried about the corporate tenant leaving, they do have 2 10 year options ahead of them and 7 years remaining on their current lease.

However, once he has moved on, if it remains full of stuff, then there might be some real possibilities.Also, if he really has a disorder, he may not have the ability to negotiate with you.

You then subtract out your loan that you have currently, and the remaining portion is what you receive back.Now, that's me answering your question though.  

I am now personally on the line for the remaining $250,000.