how much will it cost
Trying to guess the price of your serverless app is a nightmare. I set up a test aws account in the free tier, added this thing where they warn you if you're about to go over budget (above zero) and after a year got billed for the budget warning service itself, which stopped being free. without have *any* other services running.
For now I'll stick to budgeting and capacity by sizing "servers" I dont care if they are real or virtual as long as they are fixed price.
I can code, do my own sysadmin, and devops, and its less effort and risk than trying to work out how AWS pricing works.