You have an idea, you think it is a good idea based on your early validation. You start the basic design of how it should work, maybe even based on that early

You have an idea, you think it is a good idea based on your early validation. You start the basic design of how it should work, maybe even based on that early feedback. If you have no money, and you can build stuff, it doesn't matter if buying is the best advice. Should you build or should you buy? Neither. You should survive.