[bored_itworker]

Or 365 Personal with 1TB Onedrive, 50GB mailbox. If you want to add a custom domain you need to buy one at GoDaddy (yuck!)

[doubled112]

I know at least one person who doesn't use GoDaddy with their 365 family account but still has the custom domain working.

The values to configure in DNS are available as parameters in the link on the M365 side.

YMMV, of course, but DNS is DNS.

Will they support it? Unlikely. Will it work forever? No way to be sure, but isn't everything temporary anyway?