dum, if you want to help the guy maybe YOU can give your time for free and do it for him.
I'm glad you brought the work
shill back though, a very cool word which I was starting to miss in your bi-polar random attacks.
Would you expect a plumber to clean your sh*t up for free ?? Or en electrician to fix your dodgy wiring for free ?
Sheluser makes a good point that maybe someone doing an apprenticeship (these things barely exist these days), or wants to do it to gain some extra experience might want to help for free - maybe.
There comes a point where you can't keep asking for free expertise, that you have to gain the knowledge for yourself. If this prompts the OP to seek out knowledge and start practising for himself then all the better for him, he'll thank us later.
People didn't go through years at Uni/College paying thousands of bucks to get minimum wage working mostly as a teaboy and sandwich runner for 2 years in their job as an apprentice studio engineer, to give their skills away to random chancers for free...

This is one reason why many studios are closing down. The proliferation of free music and dodgy preset software mastering...forcing people with real engineering skills out of work or to another career with music a side interest.