Considering teh cost of service, IF it is leaking you are going to be paying and paying and paying,,, Even if you do it yoruself R-134 or whatever it uses is getting kind of pricy.. And if its not 134a.. VERY pricy and possibly a license needed to buy (Depends on the specific coolant).
Consider this.
But first.. CLEAN the dang thing.. Since I last posted in this thread (just after cleaning) I've yet to trip that breaker. Unit is working 100% air is cooler (Though it still can't compete with Georgia SUN.. But at least it is livable)