This is what keeps me from tinkering with the free tiers and never even attempt to host my own projects in the cloud. I want a free tier with a lock on it. I'd

This is what keeps me from tinkering with the free tiers and never even attempt to host my own projects in the cloud. I want a free tier with a lock on it. I'd very much appreciate advice for what tiers would fit my monthly use if I hit free tier caps, but if I got hit with $500 right now I'd be ruined. I think my Google compute stuff is safe, but I really don't like having any doubt.