If you're really serious about this have you considered just trying the first season part time? Maybe do trips on the weekends and when you can use vacation time at your full time job, me personally I enjoy fishing too much myself to bring other people out just to try and make a buck. Also what kind of boat do you have? You'll want a big heavy boat with a wide beam that's capable of fishing comfortably in 2-3' waves without moving around too much since you'll have a lot of people with little to no experience on a boat