You'd have to prob prep a few people for free and build a reputation up first before is willing to pay for prep services.
unfortunately this is utter bullshit
prostitutes change the value of who they are and what they do. anyone who is doing prep services for free or training for free is a whore in my book
decide what your worth, and charge accordingly.
if you are any good, you don't need to give anything away.
if you want to volunteer go to a soup kitchen
many people just like you are describing, loose clients to people like myself(not bragging, really not) because of the simple fact that people want to feel like they are in the presence of a professional. Not some xtra medium wearing rolled sleeve gym guy who is giving this
training thing a shot (not saying this is you)
btw to the OP, yes 15 years in now. dont know how to do anything else, and dont know if I could work for anyone else either
and on the bodybuilding front, it is a people business, so whether you are huge, big, tight, lean, ecto, meso, endo whatever. as long as you are doing it for the right reasons, have a philosophy of who you are, what you are about, and how to treat people who pay your bills, the money will come