hey man, live on the other side of the country from you but just want to share that the collective desire for a third space is so strong that i think no matter what you do you are doing the right thing (so long as it isn't like actively harmful or exclusive, etc.).
like, i live in a big city with a tech scene and i still yearn for a space to just go and hang out to hack in that isn't a college. you are doing a service!
FWIW, not sure how you're funding it and i have no experience just offering a take: I've always felt like I would definitely be fine with spending like $15/mo on having access to a barebones space. Maybe $20-30/mo if there was more that came with it (e.g. coffee machine, occasional events). I know rent is a PITA but I get turned off by coworking spaces that charge upwards of $200+/mo, it's just not feasible obviously for a community space.
Take with that what you will, just offering one person's pov prob in your primary demographic. i'm also kinda cheap lol so maybe i'm the low end, lol