Payment: Hello is there way to set hard limit for monthly payment for a hosting?

Im scared of overlimit the used resources and get high bill.
And my second question is, when i switch my plan to developer i gonna still getting free 5$ every month?
yes dev plan still gives you 5$ in credit every month, and if you're worried about out of control usage, switch to the credit based dev plan where you load a certain amount of credits and once those credits are used up your services and plugins will stop
Okay, thank you for your reply :).