Mike Vande wrote:I'd buy it, but I need a pack of sugarless gum, and that'll put me short on the price...

yea, even if it were a "gift", it would still be out of scope for my liquidity (probably). a guesstimate as mentioned is another couple million to remodel into something livable/usable, though if done as projects and only making a small portion a living space at first, would probably be 100k or more, just for access and minimal standards, including air-cycling (not just heat/air conditioning - but actual air conditioning for oxygen content and cleansing.
If the complex were to be brought to standards for living with electric/conditioning, and personal sanitation - this would be pretty expensive. and the monthly upkeep might be about 50k or so. There are probably more effective ways to use the space other than for living space - but given 5 mill or so, it would be a kewl project home!!