You can't imagine how many people on a server ask how multiboxing is done when you're a multiboxer. Answering to those non-multiboxing players already takes a lot of time. But in the end you meet new people and it's fun, so I don't mind.
I don't think you'll find many willing to be someone's personal mentor, just because it requires too much time. I had someone offering me 1700g to teach him multiboxing and that was quite appealing ... right until I understood that he's a minor and not the owner of the accounts and I told him I couldn't take his gold and help him further (I won't help someone break the Terms of Use).

There's enough information available online anyway. It's not very well organized, but it's there. When people have trouble with that and want me as their personal trainer, it's gonna cost them gold :P