A straight swap - same opening size, modern door, no header work - is a single visit. Where it runs long is when the original 1966 framing needs reinforcing to carry a heavier insulated door, or when the opening doesn't match a stock width and we're waiting on a custom order. Golden Valley's housing age means we see the second case more here than in newer construction: narrower single-bay openings, headers sized for a lighter wood panel, and track mounted for extension springs rather than torsion. We'll tell you on the measure visit which case you're in, and if it's a custom order, we'll give you the manufacturer's lead time rather than guess at it.