So today, our supplier breaks down the cost of the new door.
$5,650.00 for the door
$ 350.00 for labor
Somehow, that just doesn't seem right. The guy said it would take 5 to 6 hours with the storm door for installation. That's way low for labor (at least I would think they'd charge more).
If I remember right, my last contractor charged me $75/hour for one guy. They would have given me what would have amounted to a lower hourly rate if they could have blocked it out at either a half day or a full day, but the job was only going to take a couple of hours so we went with that. So your labor cost really isn't that far out of line, if they are planning only a single guy for the install. Installing a prehung door is pretty straight forward, IF they know what they are doing, the door fits into the existing space and your house doesn't have any buried problems.