I would think so. At least, at the repair station where I worked, labor costs could add up quickly depending on the aircraft.
For the annual, however, you have to have an IA, or have one sign off for you.
Since I left the shop, I didn't bother finishing my ratings (don't need one at a repair station) and am building an experimental.
I don't really like working on other folks' planes for a living... too much like *work*.