Earlier quoted context omitted.
I'm perfectly capable, as is the vast majority of even passing readers of HN. If you think that the hard part is setting up the mail server, you're exactly the type of person that should _not_ be hosting it yourself. The problem is, and always has been, deliverability.
Deliverability _is_ a part of setting everything properly. Setting up mail is not juts installing exim and expecting everything will work by some magic and the manual online. I do host mail for tens of domains and never had issues with deliverability.
You don't 'set up' deliverability.