I don't know about your dealer, but mine gets $25 per plug (I pay $7 per plug) and dealers usually get $100+ per hour. It's not that hard, just time consuming. Again, just check out you tubeThose plugs are VERY deep in there! I cannot remember the socket I used, but I do know that I really struggled getting them out!
I eventually ended up getting the plugs loose, then using a magnet on a wire to pull them out.
If I had to change plugs again, I probably wouldn't.
For the effort, I would just take the bike to a dealer and get them to do it.