Cant belive as to why you would pay the company to take their aircraft to their maintanance organisation for them
I know a few PPLs who do exactly that. The school uses a maintenance firm a long away away (why, I can only speculate, but this practice is pretty common on the training scene) and they get various self fly hire renters to ferry the planes there, and they charge them just the fuel. The chap hangs around while the 50hr check is done and then flies back.