K.P.
If you do not have a certain market for your services, then don't open a business. I forget the statistic, but the majority fail within the first two years. You will end up sinking your savings into it and there are no "boundaries" when it is your company.
30 years ago my father walked away from a lucrative career with RJ Reynolds to buy into my mother's family business. I will tell you that there were months when they were paying company bills out of their personal savings. My parents "loaned" the company money on several occassions and this is a business that has now been around for nearly 60 years. You also don't get to leave the office- your phone will ring at all random hours and you have to answer b/c you can't lose the client. You will be doing paperwork until all hours of the night and on Saturdays.
My parents wouldn't have it any other way and are very successful financially , but it is a difficult lifestyle to live.
If you don't have a stock of cash and excellent credit to get a business loan AND a real market to sell your services- go corporate.