Not really, it’s like hosting your own email server. Sounds great in theory and is a fun project but at the end of the day all you get is a vanity URL and a headache.

I haven’t researched it at all but I’d be very surprised if you needed anything more than a domain name (basically free as long as you don’t go for a common TLD) and somewhere to host it (literally free if you do it on a home PC but that comes with other issues). Cloudflare and extra security are nice but aren’t necessary for something like this.