Why bother explaining? If he doesn't want to get it, approach it as a contract work: a limited offer where you do what he asks you within a limited time frame a

Why bother explaining? If he doesn't want to get it, approach it as a contract work: a limited offer where you do what he asks you within a limited time frame and he pays you in exchange, and after that you bail out. If he already thinks that's what your role should be anyway, then you got yourself a low risk contract work. Chances are, soon after the work starts, he himself will figure out after a while that this model won't work out, and then you can have a deeper discussion with him, where he actually has some experience to base the discussion off of.