I don't know. The fact that it's hard to find someone to do it tells you its hard and not something people like to make a business out of. That said, if the stair climbing dolly/conveyer is, say, $15K, it wouldn't take long to pay that off even if you charged an average of, say, $500-$750 a move. The ESS guys were literally at my house less than a half hour when they used that dolly to move a safe down bulkhead stairs. I couldn't believe how easy it was for them.
Yes but my issue is that the cost should scale with the distance traveled and the effort. Time & materials, or T & M plus something maybe.