I work in the IT Industry. SIgned up to the Free Apps for Domains purely so I could use my personal domain with gmail for me and the wife. It worked well. So well, I recommended it to other people. When the free version finished, I recommended people needing email for business to sign up and pay for it. Google have received a lot of business from me.
I pay for extra storage for my account for Google Drive.
The ideal soluition would be for my Workplace organisation to be converted to standard gmail accounts in a family group, so I could sign up for Google One to pay for more storage we could share.
Here's an idea - give Google One customers on higher tiers the ability to use a custom email domain for their family group. I'd pay for that.