I believe you need to make an investment out of your own pocket to apply for that visa. An immigration lawyer told me $200k, do you know if you can go lower than that?
The latter also will cause you to hear sums like $200k be quoted. Our number was higher than this when we applied (we raised our first round outside of the States), so I do not know if there is a lower bound. This whole process is not well defined and is very much an exercise in compelling storytelling to convince the Visa officer that you're not committing fraud.