I'd agree that 6,000 seems high for 4 screens.
I had a similar theatre once... sucked myself into a deal that ended with me paying $10,000/mo for the lease, plus another $3,000 for NNN fees... nothing included. We worked hard for the landlord, but didn't make anything for us.
If you do decide to go with this, get your NNN fees disclosed upfront and get something in the lease that requires them to do an annual list of those fees for you. I didn't on this one, and frequently wondered if I wasn't getting screwed there, too.
If you land at something like $8,000 total, your first $1,000 gross, per week/screen will go to pay for the rent (after average percentages).
With no bail-out clause, it would have to be a very impressive situation for me to get interested in this. If it was that impressive, I'd have a hard time believing the owner dumped it merely because he was "tired of it". No effort to sell it himself?
I think they also have a couple of theatres in Douglas County. You might look into how those places are doing... logging economy, though... maybe not the most stable.