* What exactly was his plan for the building? I don't see anything coherent. One moment it's a makerspace, another it's a music warehouse, then it's a science museum. Was there a coherent plan? $281k is a lot of money to spend with no real plan.
* The city allegedly giving him grief. I'm still not sure if this was preventable or not considering the bit about how he failed to submit building plans. If your plan is to own a significant chunk of this city, you're going to have to play better politics than repeatedly being asked to leave at public functions. Palm-greasing would be a far better strategy than righteous anger. Maybe a fraction of that $900k could've opened a nice park they always wanted. Maybe the PD needs a new bearcat. Something.
* Living in a tent on the lot instead of hiring security. This bit was straight out of some episode of a sitcom. This is a depressed flyover country town. If you couldn't afford security then you couldn't afford the building. Again, a good chunk of that $900k would cover round-the-clock security for at least a year. Righteous indignation over the crime isn't an actual cost-cutting measure.
* The land is cheap for a reason. The way a town gets revitalised is external value flows in. How would the makerspace-warehouse-museum thing bring that value into the city? Even if all this did pan out, I'd predict an entirely new problem he'd have, which is no willing customers outside of a 200 mile radius.
I don't get why people make cockeyed "investments" like these when the S&P 500 is sitting right there at a nice 8% a year. No bums, no politics, no thinking it through at all really. Just buy it and don't touch it. If your idea can't do better than that intersection of earnings and effort, don't bother with it.