Just want to say be careful bidding 100 percent removal. I've made that mistake more than once.I've done test spots that came out ok then you do the job and it sticks like glue everywhere else. It seems that the depainting jobs (brick, cinderblock) are very tricky, because it will either jump right off, or depending on the paint and porosity of the substrate, it can be very difficult. I would hit it @ 2.75 to 3.00 per sq ft If I felt good about it. I haven't done any smooth concrete though. I know coal slag (Black beauty) is very good for paint removal I've used a lot of it,it does however cut very quickly so you gotta back off until you find just the right distance. If you have a ball valve type deadman and haven't shot it before it can eat the valve very quickly. like you, I'm usually the one on the hose, My guys move too slow and I cant stand watching my profit go out the nozzle. I have an old post office job where they want the paint removed from the plaster walls, you guys have any ideas if the plaster will hold up?
Hope it works out for you, that will be a nice job.
Good Luck