steve you'll do just fine, just being an ifbb pro will get u a good amt of business.......
but keep this in mind, dont get fat in the offseason, thats the biggest misake i think personal training bb'ers make........ur already a big guy, so that limits your clientele........but if u get too big in the offseason that'll make alot of clients shy away.
try to go the stan mcquay route and keep size on, but stay lean and dont get too big, try to look as normal as u can in clothes, because the only ppl who like freaks are the types of schmoes who'd be more likely to pay for u to wrestle them in a thong and covered in oil in a motel 6 than pay u for a personal training session.