I wouldn't give any equity away in this case. Why? He has not done anything yet. This sounds like you are afraid of sales/marketing/biz dev/something and you

I wouldn't give any equity away in this case. Why? He has not done anything yet. This sounds like you are afraid of sales/marketing/biz dev/something and you think he will solve your problems. I warn you: he will not solve your problems, you will have more on your hands.