Long story short, things went south and they had to make a change late on a Sunday night.

After years of struggling just to get by and eating Taco Bell every night because my wife was a manager and got free food I can say were in a pretty good place right now.

One that doesn't work another full time day job and can only work you in on nights and weekends?  

Office can also leave pretty quick in the middle of the night.

The instruments are often not used properly and misunderstood by both parties.

The plow would need to be welded on so proper install is important.

:you cannot control the cleaning agents the tenants use.Shouldn't be a concern as long as you first warn them, and have a proper security deposit.

The point is, all modifications must be ratified by all parties, full signature and date somewhere otherwise the mods are not enforceable.Your problem is, if not properly ratified, what's the next step for you - - is it worth your effort to pursue further?

The rightful Owner might be better off just having it listed, to find an Owner-occupier who will pay the proper market value.

It's hard to work up enthusiasm for going and doing an estimate -which takes a good while to do properly - for an investor with an unknown track record.