Hosting an instance just for yourself?

Hello, with the spicy beehaw drama I was wondering, would it be possible to selfhost a lemmy instance literally just for yourseelf and no one else to like, circumvent any defederation shenanigans? As all instances federate per default, this should work right?...

https://kbin.social/m/[email protected]l/t/25230

Hosting an instance just for yourself? - asklemmy - kbin.social

Hello, with the spicy beehaw drama I was wondering, would it be possible to selfhost a lemmy instance literally just for yourself and no one else to like, circumvent any defederation shenanigans? As all instances federate per default, this should work right?...

Other than that is there any obvious downside to doing that?

You must be able to administrate and pay for a server.
Apart from that, it would not be nice to participate in the network and use the computing capacity of others, but not bring any infrastructure into the network yourself (by registration lock).

It's not really all that difficult to spin up your own "server". Sure, desktop hardware isn't exactly targeted towards running a web server, but for a purpose like your own Lemmy/federation, I'd imagine just about any old hardware from the last 5 years or so oughta be fine.
To me, the desktop hardware note sounds like you want to host the instance at home. In that case you need a suitable router, a static IP address or a DNS service, besides your own domain.