Re: Email SPOF
Try Mythic Beasts as a hosting provider, as recommended by denizens of this 'ere forum.
I'm retired now, so needs are minimal. Three quid a month (including VAT) gets me basic hosting with PHP and a MySQL database and unlimited email addresses, although catch-all redirection means I just need one mailbox to support an effectively infinite number of email addresses. Need to register somewhere? That email will be yourcompany @ mydomain.whatever.
My previous provider got subsumed into the GoDaddy empire and, as I don't do business with fascists or slaughterers of wildlife, I moved my hosting and that of my few remaining pro-bono clients to MB. While I was transferring mailboxes from one to the other I had both providers webmail clients (Roundcube in both cases) open in adjacent tabs in Firefox so thought that I would compare their search performance. MB returned a result in 10 seconds or so, GoDaddy just span it's wheels for a minute or so and then timed out.
Edit: forgot to say that their tech support is exemplary as well.