Now we are getting somewhere.
I can give you a yes or no answer, I just need more info...
Did the guy ever train himself or just read the material? TRAINED HIMSELF WITH TONS OF JUICY BUT MEDIOCRE TO SUB-MEDIOCRE RESULTS
If he DID train himself, for how long? YEARS OF TRAINING FOR MEDIOCRE RESULTS
Did he train any other fighters with any other previous fighter with any success? NO RECORD OF ANY SUCCESS TRAINING OTHERS TO RESULT
Gimme some stats of the best 3 guys in his camp? MEDIOCRE AT BEST
Is this guys going to be my main coach, or just someone to help me with a specific part of the MMA spectrum? HE'LL GIVE YOU ADVICE ON WHATEVER YOU ASK
Is he the only coach in that area of my training or I'm I just consulting him for specific skills? THERE ARE TONS OF OTHER COACHES WHO HAVE LONG HISTORIES, SUCCESSFUL FIGHTING CAREERS AND NUMEROUS AWARDS.
Finally, am I paying for his help, or is it free of charge? YOU WOULD NOT BE PAYING, BUT HIS ADVICE MAY PUT YOUR LIFE AT RISK IF HE TRAINS YOU, YOU BELIEVE HIM AND YOU PROCEED TO JUMP IN THE RING AND GET YOUR NECK SNAPPED.
Gimme something more to go on, I'll give you a yes or no answer as you asked.