Cost me $80 for a chassis dyno session for a 1 and done. Technically it was 3, a test run to make sure it was working, a power run, the the guy got curious and said power was still climbing. So we made another. Shouldn't cost too much more. It was one of the dynos with the drums in the floor, not the ones bolted to the hub.
That's a little more reasonable. They bring one of those trailered setups out to different car cruises usually a few times a year, that might be the way to go.