There are companies that do do this on a mobile basis. I recently got a new coach and wanted this done. My local shop that I had been using for service for many years wanted a ton of money to do it, then I discovered that actually they used a mobile service that I could deal with directly. Less than half the price. All you need is a relatively level spot, a reliable company to do it if you can find one in your area and an hour's time.
I believe it's worth getting done once a new rig is loaded and some manufacturers strongly recommended it in their manuals. In my case, all was well except for (castor, I think) that was well out of specs. I had this done on my last coach as well and all I can say is that I didn't have any handling or tire-wear problems over my time with the coach (12 years).
So...I'm a believer FWIW.