Unfortunately I was in this basement without a flashlight and this area wasn't well lit. From what I could see the firebox looked good, the grates looked ok, but didn't try to move them.
I bet a pro could bring it back to life. If you were doing it for yourself it would still cost a lot to move it. If you had a warehouse, factory, or something like that would be manned for at least 2 shifts it might be feasible. I’m sure each city has a few of these in old commercial buildings, and even old schools.. all shutdown like this, where the next step would be scrap
. Unfortunately not many business owners would be interested in the maintenance associated with something like this, where you can just get a big gas or oil fired boiler that is hands off. Insurance might be another issue.
For apartments you'd want it to be hands off too. They make some great stoker boilers at Axeman-Anderson (Made in Williamsport), and so does the makers of the "Coal-Gun" from Alternate Heating Systems. One of our forum members uses one for multi unit apartments building. Alternate Heating Systems has all sizes for single home up to 50,000 SQ ft. They have monster too, the S1500 Coal Gun is rated at 1,650,000 BTU / hr, and 50,000 SQ ft. Auger that puppy into a 500-1000 lb coal bin, you'd be set for a while.