I've asked only 1-5 hours per week from this individual. I've managed our frontend dev from an outsourced team in Poland and based on my same "can't program knows how many hours it takes" effectively hit the deadline/hours budget with only about 10-20 hours over.
It's not half the work. At the end of the day I have to sell it. In order to put more features and offer more we need to sell it. We need clients, programmers don't care about that. Which I understand, why should they it's not their job.
I wanted to offer equal equity the same as my partner and I, but due to personality differences I don't believe we can. My partner and I invested $30k into the startup including paying him on a contractual basis, how do you give someone equal equity after this?