The Boggled

I have been thinking about upgrading my camera for quite some time, and I have been going back and forth though this though process of: if I were to get a new camera with my budget, what would it be? I may have come to a conclusion, but I want to sleep on it and come up with a plan after I fully think things thoroughly. I cannot take this lightly, but I need to be sure that upgrading to a better camera is a valid investment in my photo business. However, at this point, I am not sure.
-Simply Complicated