leggomyeggo:I think I would have to say dive masters. They both are certified NAUI instructors also. Sorry you will have to excuse my lack of experience, I am a recreational guy and a lowly boat owner/captain
Jack
Just to check, by captain, I assume you mean a licensed Coast Guard Captain (I get people who call me looking for work saying they can captain a boat, turns out they owned boats or had maybe a boating safety class at one time, but not the required license), don't forget you'll need an additional Captain on board if you ever intend to dive (get off the boat) yourself and you are operating commercially.
Also, you'll need to check with the state for permitting. It's a bit of a process, plus you'll likely have to pay for commercial moorage fees (it costs $200 a month minimum just for the privelege of using the boat ramp for commercial ops here) and such.
You've got some homework ahead of you.