The Cost of This Job
I'm not going to put a number here that I can't back up - what a repair or reinforcement costs depends on the door's width, its current track and hardware, and what's behind the opening framing-wise, and none of that is something I can guess from a fact sheet. What I can tell you is what drives the cost up or down on a wide door specifically: whether the horizontal struts are already there or need adding, whether the track brackets are pulling from wood that's been in place since the house was built, and whether the opener has enough reserve capacity to handle a heavier reinforced panel.
With 155,574 owner-occupied houses across this service area, a lot of them still carry the original opening framed sometime between 1938 and 2014. On the older end of that range, the fix is often reinforcement plus hardware - not a full replacement. On a door that's already sagging or delaminating, replacement usually costs less over time than repeated patch repairs. An honest look at the door in person is the only way to know which side of that line you're on.
Doing Nothing For Now
A wide door that flexes in wind but still opens and closes doesn't feel urgent, and most winters here that's a fair read. But the failure pattern on a wide door isn't usually one big event - it's the track pulling a little further from the jamb each time the wind loads it, especially once the cold sets in and the wood or masonry it's anchored to contracts.
Wait through one full cold-severe season on a door that's already flexing, and the hardware wear compounds. Rollers ride rougher in the track, the opener works harder to pull a door that's not tracking true, and the panel itself can start to bow permanently at the center rail. None of that shows up overnight. It shows up as a call that used to be a tightening job and is now a track-and-panel job.
Waiting isn't automatically wrong - a door with minor flex and solid anchoring can go years without trouble. The risk is assuming that's what you have without anyone looking at the anchoring itself.
