Based on my own experience I would not do this again. I did this for a while starting in 2001, and then for a bit from 2005-2010. Essentially what happened a l

Based on my own experience I would not do this again. I did this for a while starting in 2001, and then for a bit from 2005-2010. Essentially what happened a lot was that the domain providers seemed to realize that email hosting was a pain (it is, but it also isn't, depending on your time and resources), and so there were relatively frequent plan changes and service quality changes. It wasn't their core business, and this "core" thing always comes up in internal discussions when people are annoyed by something they're doing which they don't like doing. Running my own mail server has been easier. G Suite and Fastmail have also been easier. However I wouldn't call the domain registrar experience a bad experience. So if the numbers add up for you, why not try it? I'd also treat the business v. personal as a separate problem. For example maybe you could get a personal email at a lower-cost domain name and own two domains, never a bad idea.