I'll say this for Apple Mail (the email service, not the email client): it's dirt cheap and works really well. You can bring up to 5 self-owned domains to it on the $1/mo iCloud+ plan. That price includes 6 users, and up to 3 aliases ("[email protected]") per person. Even when Proton isn't helping the FBI identify protesters[0], their family plan is $24/mo if you pay annually.

I ran my own server for about 25 years. I put in my time and got tired of doing it. I've migrated my own email to Apple's servers mainly because it's the only reasonably priced family host I could find.

[0] https://www.404media.co/proton-mail-helped-fbi-unmask-anonym...