Pretty vague question!
Equally vague answer. How much will you pay?
More to the point. There is more to welding than just stepping up to the plate and swinging the bat.
Are you working on Tractor out in the field or bridge over a river?
Do you have a procedure that requires things like joint preperation, preheat, interpass, NDE or PWHT.
Most rig welders have a minimum charge plus milage.