You'll also have to consider building some rep in the community. No one trusts the new guy in town, you know what I mean?
Write articles, case studies, pen testing experiences and all those sort of stuff,Inject a little self promotion of course. That makes your audience aware of what you are, what you do and a little about How you do it.
Then run LinkedIn ads, I think they give you $50 credit to start with. See how that turns out. Although don't keep your hopes too high during the first run, getting Pen testing clients isn't really a piece of cake. Its a tough road, bumpy one at that but you wouldn't know which turns to take until you actually set foot, would you now?
