A broken cable on a spring-loaded door is not a safe weekend project, full stop - the stored tension in that spring is what makes the job dangerous, and it's the same whether the door is a year old or from the 1960s housing stock common in Pacolet. If a cable has snapped and the door is hanging or the spring has slipped, don't try to muscle it back into place.
What an owner can safely do is look: check whether it's one cable or two that look frayed, note whether the door is stuck open, stuck down, or crooked, and avoid running the opener if the door isn't moving freely. That information helps us load the right parts before we make the 10-mile drive out, and with a median household income of $46,120 in this area, getting the job right on the first visit matters more than it would somewhere with more room in the budget for a second trip.