A straight cable replacement on one side of a residential door, torsion or extension spring type, usually runs under two hours once the tech is on site and has the right parts staged. Add time if both cables are gone, if the drums are worn and need swapping too, or if the door's been forced down off-track trying to close on a broken cable - that last one is more common than people expect, because most folks keep working the opener before they realize what's wrong.
Since the houses in this part of Altamonte Springs mostly date to the early 1980s, a lot of what we find is original or first-replacement hardware - galvanized cable that's done its twenty-plus years and is simply at the end of its life, not damaged by anything unusual. That's a cleaner job than cable torn by rust or impact, and it tends to go fast.