Repair costs will depend on th situation, is it an underground break that will require machinery to dig it up, or an in wall break with some wall removal to repair. Also did the pipe break because of a freeze or is it because of old corroded pipes that may need to be replaced in entirety ?
A simple break (if there ever is one ) should not be bank breaking to have repaired maybe $100's but a whole line replacement will be in the $1,000's.
Make sure the plumbing guys you use are not just band aiding the problem, if the whole line needs replacing , get it done now, the repair will become the strongest part and somewhere else will break sooner rather than later.
Look at the break if possible, look inside the pipe (if it's galvanized) and see how occluded it is (full of buildup) do the walls of the pipe look thin and corroded. Chances are if the building is old with galvanized pipe that it may need replacing.