You would have to really nail down your point of difference so that people keep coming back. If it's more of a maker-space then I could see it being more of a men's-shed (and ladies) type of idea where you can go to build your own brewing stuff. For example I'm in the process of building a counterflow wort chiller that I need a TIG welder for. I don't have the sort of set up to weld it, but I'd be stoked to be able to pay money to a brewing-oriented place and be able to weld it myself (rather than hand over my precious SS to a shoddy welder). Also, I would gladly pay the money to somewhere that has a nice vibe and is more of a brewing club, like someone else suggested.
I think some of the key things would be being able to do the work myself, but with help if I needed it. A good set up so I can work on electronics through to welding, through to milling my own grain/buying ingredients perhaps. Maybe somewhere I could store my vials of yeast which my wife hates having in the freezer. Also a social hub for brewing with the occasional events/tutorials/hardware development.
If you've expecting people to hand over their money then you need to offer something more/different than their own backyard/shed experience.
A place with friends to tinker. Brewing can be quite isolating, which has it's perks, but some of the other elements of the brewing process could definitely do with some other people around.
I suppose I'm thinking of it as like a physical version of this forum.
Hmmm, bit of a brain dump sorry! Hope it's helpful.