Most torsion spring jobs on a door this age are a same-visit fix: we match the wire size and wind to your existing drum, pull the old coil, and set the new one with a winding bar - not by hand, and not with a job like this left half-tensioned overnight. We check the cables and rollers while we're in there, since a spring failure often stresses those parts too, and replacing a frayed cable alongside the spring costs far less than a second trip later.
One honest limit here: if your door is an extension-spring setup on an older outbuilding rather than a torsion system, and the pulley or track hardware is worn past matching, we may need to order a part rather than carry it standard on the truck. That's not common on Grandwood Park's 1991-era stock, but it happens on the handful of older detached structures we still see.