Stop. This is not a valid startup and a waste of your time.

I say this with a heavy heart as I know you're passionate, but numerous failed startups of my own tought me to be critical in thinking.

What is you're "secret sauce"? How hard is it to replicate/exceed your efforts? I'm afraid the answers are "we put a lot of engineering work into it" and "not much, as we're just two guys and the army/google/fb have hundreds of engineers", and you're limited by physics. It's not like you invented new super-light batteries, did you?

I'm afraid this will likely be a waste of your time. You'll have fun, learn a lot, and that can be a goal on its own, But don't take a mortage....

sorry..