why not do it on the side, sounds like a good idea... big difference between bodybuilding and PT though, most of your clients will be looking to improve their health and fitness not become huge lol
most of the guys who want to be big reckon they know it all and are in the gym trying to lift twice what they should with bad form and no control lol
My old man is heavily involved in the PCYC in St Kilda and they are always looking for volunteers etc... you could do a few shifts there to get experience etc... he quit advertising after 30yrs and is now a personal trainer, mostly training clients over 50 as that's his niche...
great way to get out of the office tho... and learn some new skills at the same time... I wouldn't go quitting your day job just yet but as a side project its great... most clients would want to train before or after work anyways so you could still work your 9-5
Edit: oh and come play basketball with the SAU team! we need someone who is fit lol