A single-panel swap on a standard door, once the part is on-site, is usually a one-visit job - a couple of hours covers removing the damaged section, transferring hardware, and reseating the track. The wait is almost always on the panel itself, not the install. Steel sections for doors from the 1960s-70s building stock that's common across this area aren't always a same-day order; if your door uses a discontinued profile, sourcing the right match can take longer than the repair.
We'll tell you the lead time as soon as we've identified the panel, not after we've already scheduled you. If the wait is long enough that driving on a cracked or bowed panel isn't safe, we'll talk through a temporary option rather than leave you guessing.