You can even boot a "gotosocial" on a raspberri-pi at home for almost free (it'll cost a pi, and some electricity). Or on a €2/month VPS. And while gotosocial

You can even boot a "gotosocial" on a raspberri-pi at home for almost free (it'll cost a pi, and some electricity). Or on a €2/month VPS. And while gotosocial is still a multitier server (it resembles mastodon in much), there's nothing fundamental stopping the development of an even simpler rust/go/x activitypub server that acts for one actor only - a single-user server, which could be far, far simpler and leaner even.