New Direction, New Career?

So, I've been toying, well, truly considering a career change. I've been in corporate America for the past 6 years. This last January I started teaching a triathlon class, so I was busy from 5:45 AM - 5:00 PM, plus my own training. I was busy, but enjoying it. I have recently started personal training a few clients which makes for some long days, 5:45AM-8:00PM and trying to find time to fit in my training, and, more importantly, spending quality time with my wife and daughter. I haven't had any time to work on the web site, which is my ultimate career goal. (More on that on another post.). Plan A was to quit Corporate America, find a part time job, do personal training/triathlon training and work on the web site. I have been searching for an IT part time job for a few months and due to the economy I just haven't found much. (I don't think stirring sloppy joes at a local elementary school is in the cards for me :). So, how about quitting Corporate America, going to personal training full-time and work on the web site at night? This is the path I'm seriously exploring. The big caveat here is, as all personal trainers know, the job is 75% sales, 25% training. I would need at least 5-6 months, realistically, to build up a clientele that I could come remotely close to my current income. I have a few ideas of how I could cover income for a few months. Anyone have any input, similar experiences? Any advice would be greatly appreciated.