Either this is something you believe in or not. If you don't believe in it, maybe negotiate up to 10% and work your regular job. If you do believe, go all in.

Either this is something you believe in or not. If you don't believe in it, maybe negotiate up to 10% and work your regular job. If you do believe, go all in. Move back in with your parents, get a part time retail gig for spending money. This startup is your full time job now. Sounds like you don't really think it's good to work out. What's the difference between 3% of 0 or 10% of 9. Furthermore, once you leave the product is probably going to collapse. Ideas are worthless FYI. What is your co founder going to do when you leave ? Hire someone ? Find another person to build it ?