By doing this, you're guaranteeing a bus factor of below 1. I can't think of any business that wouldn't see that as being a completely unacceptable risk.
I never understand the drive to stay away from cloud services for small scale operations. It’s not your money that’s being spent on the cloud, but it is your free time being asked to be on call when you encourage your company to self-host!
I’ve seen this before. It turns into restrictions on when you can schedule vacation times.
Not fun when your family wants to go on a trip but you can’t get the time off because it’s not one of the allowed vacation times.