Couple of questions/observations:
1) It's hard to tell from the pictures but is that a pull in/back out site? That's really not preferred set up as it screws with traffic flow and if the meterboxes are on the "nose" wall of the bay, you're inviting maintenance issues
2) Are there existing vacuum islands with conduit? Is the conduit in good enough shape if you have to pull new cable? In not, you're looking a big $$$ to run power to the vacuums
3) Can you get the site for the value of the dirt? It's safe to assume that all new equipment is going to run you $15K a bay at least. That doesn't include any install, labor, permitting, paying off zoning board members and/or inspectors, or potential utility upgrades.
4) I would assume the boiler is junk. At least that way if it's functional, you get a nice surprise.
5) If this is a northern climate and it's been shut down for some time it's safe to assume plumbing damage, including a good probability that one or more floor heat loops are toast. That ain't a cheap fix.
6) Your "consultant" should be able to find some historical records(permits, past owners, past tax filings, etc) that may give you some perspective on why it's shut. There are three main reasons washes shut down: Bad operator, bad operation, bad location. You may be able to reach out to local distributors/dealers to see what they know of the site.
7) What on the building may need to be fixed? You could be talking hundreds to thousands to 10s of thousands