I 've tried Fiverr, and Craigslist; I can't afford a huge expert, just someone whose brain I can pick for a few hours at time when needed, and I can't use the ad function on this site; how to get it?
If you want an SEO expert to consult, the reality is that you will have to fork out money. Check for any service providers who are selling SEO services in the Buy and Sell trade section and perhaps you can negotiate with them on what you want.
A couple of hours with even a small-time SEO expert is going to cost you plenty, and you want them to be on tap so you can bug them as necessary? Has anyone got time for that? What would you charge that would make it ok to have such interruptions? I'd recommend doing lots of reading and experimenting and forget the mentor idea.
No need; right now, I have finally found someone whose brains I can pick, and am indubitably happy with the set-up.