Terry you really have to have the right equipment and show a professional front I think. I can't tell you how impressed sometimes some of the HOA's & PM's are when they see us roll into a complex with a trailer set up and looking good
For getting the commercial work, a lot of it is a long haul deal, you have to start somewhere, you have to get that 1st job and then the 2nd & 3rd. Research the boards, I have learned don't go for the one time cleaning, do a demo, and push the monthly, quarterly or biannual cleaning. I see it takes some time to become established and actually make enough money to survive. You are lucky you have an established biz, so you will survive while building your commercial side
You have to target what you want or what you think types of commercial work need your services most. TARGETING its a long haul like I said, every month or so someone should be getting something from you. I have PM's that I have targeted for over three years and never got a call from them and then quite often I finally get "The Call" Its happened this year
Look around and see who needs you then GO FOR IT