While, by default, this would definitely not be my mindset, ("how can I take money from these people since I don't have anything to give them right now?") this

While, by default, this would definitely not be my mindset, ("how can I take money from these people since I don't have anything to give them right now?") this is a good question. This is probably a good idea: - to validate your idea with real customers, - motivate you to actually finish it - and get a growing list of people who can give you feedback.