Well, I'm not going to say its impossible to just change the cable. I wouldnt even try. I doubt you find a mechanic that will just change the cable, when they can order a part that is that cheap and easy to change. 99.9999% they will change the whole regulator. As far as patience and time, were talking about something that isnt any harder then taking the door panel off. But taking it to a mechanic, I'd guess part cost $50-$70, labor if they round up to an hour, probably $150-$175 total.