The thing I really want out of these services is the ability to set a payment cap. It’s probably never going to be an issue, but I have anxiety, and I can’t sleep easily knowing that if I fuck up, if someone sinister abuses my application or whatever I may be stuck with a giant bill.
Seems like this is a huge dealbreaker. You cannot be expected to perfectly audit your side project for security. Suppose someone finds a remote code execution and starts mining Monero on it. Or someone just points a botnet at it. You could be on the hook for an unlimited amount of money.
Might as well just install Kubernetes on a monthly-fee VPS and pretend you're using GCP.