From experience here is what I have found to be true: if a person is HIGHLY MOTIVATED they will find a way, with or without a "mentor". You WILL find help along the way tho, sometimes from unexpected sources. The KEY is to never give up, work every single day (yes including weekends) and burn with so much fire YOU WILL NOT BE STOPPED.
If I find a person like that - and he/she PROVES it to me over time by doing the above - then I will help them in depth. Otherwise, a word of advice here or there.
My point? Motivated people who are driven, often by extreme need, win. Simple as that. Best of luck!!
PS: Shark Tank RULES and I would do such dirty things to that hot blonde spinner Lori Grenier. LOL