If you want it to be an actual community service, then you want it to be something that outlives your residence, your tenure as event coordinator, and your interest in being the neighborhood IT guy. It’ll be much easier to transfer control of a VPS to your successor than to give them hardware that also hosts a bunch of your personal services.

You can start with a very small, nearly free VPS while you recruit users & scale up as (if) anyone bites. Probably even get the HOA to pay for it.