You said you would give numbers but then don't. How much money do you need to survive two months? or is it not two months? If the valuation is 750K and he is getting 1/3 the company, is he giving you 250k cash? are you burning 125k per month? what is your monthly nut personal and company?
Anyway, it is super obvious you are not comfortable with this guy and don't trust him, but you are thinking of making him an equal partner? Big Mistake.