@Otis Sutton I really do think the word "mentor" could be attached to many people, all of whom could assist you in growth as an entrepreneur, real estate industry participant, marketer, negotiator and leader. Do some evaluation; most simply lack the ability to know how their strengths and/or needs translate to achieving their personal and/or professional goals.
The amazing thing about REI is that you will eventually land doing what you do best. Help others help you by doing your own homework, taking a journal and listening to every podcast on BP and others like it; reading blogs; asking specific questions that take industry leaders very little time to answer. The best advice I have gotten from mentorships have come at the cost of a cup of coffee or lunch. Everything I have paid for has left me dissatisfied and skeptical because no one will ever care as much about my business as I, and marketing is not mentorship! That said, those lacking passion for real estate won't be much help to you.
Go methodically and thoroughly. Ask the right questions, and don't stop asking. All the best in your endeavors!