Depends, to some degree, on which version of the Sumo Springs you're installing. I installed the Solos, part # SSR-325-47, myself...here in Tucson. If you're looking at the Maxim, part # SSR-326-47-1, they look to be more involved. I don't know about the Sumos for the front - part # SSF-106-40, but they also look a bit more involved.
Installation of the Solos is pretty easy. Jack up the RV so the wheels are hanging (you may want to use jack stands...) then slide out the old bump stops and jam in the new ones. I think the only tool I needed beyond the jack was a screw driver to pry out the old one and jam in the new one.
In any case, I'd think any reasonable automotive place would be able to do it if they've got appropriate jacks. I had some work done at TCI Tire Center (W Glenn). They're mostly a truck tire place, so they have the right equipment. I don't know if they'd do this type of installation, but it would be worth a call.
2015 Solera 24R
2014 Mercedes Chassis