Email’s not nearly as hard to host as people make it out to be. It is intimidating, yes, and there are a few very specific gotchas that make it infeasible or impractical from most if not all home internet connections, but if you’re willing to outsource just a little bit on that one particular point so that you have a static, commercial-grade IP address somewhere that you can get reverse DNS and open up SMTP ports on, the rest of it is mostly just fighting with your usual, standard self-hosting struggles of getting it configured and working at all, then making sure it’s secure and stays secure, and making sure your data is protected. The setup might be slightly more advanced than some other services just due to the number of moving parts, but it’s not fundamentally any different than a webserver. There are some other issues that might crop up a little later in the game, managing your mail server’s reputation for not sending spam (especially if, at some point, someone DOES get access and starts sending spam, you need to figure out how to recover your reputation). But overall it’s manageable, I’ve been self-hosting my email for like 30 years. It sucks, but it’s worth it.