Booking Question

I have owned a club downtown for the past few years. We usually rent out the big room for large parties, and also end up renting PA Systems for sound. However, I have been thinking about getting one installed so i can run it myself. The overhead cost is pretty high, but I think the long term savings will be much higher then the price up front. I have been told by many different club owners that this would be the wise thing to do. I am looking forward to hearing back for advice on what my next step is.