Hosting a public wishlist

I'm involved with an org that needs to set up a public wishlist for supplies for a project. The rough requirements are as follows:

• Public webpage with a static URL
• Can be easily edited by non-technical people
• Editing requires authentication
• Avoiding corporate services, especially avoiding tracking of both users and admins
• As cheap as reasonably possible
• As quick to set up as possible

Nice to have:

• Hosted under a custom domain
• Supports users "reserving" items so multiple people don't all supply the same stuff

One option I considered would be running something like wishthis in a VPS under our own domain, but this is kinda expensive, complex, and I don't trust wishthis' auth. A different option could be just having a static page in something like Notion or Github pages, which would be free but relies on corporate services we don't trust.

Is there a middle ground between the two previous options? Or a better solution that fits most of the requirements?