J. Clarke wrote:

Cost of my labor doesn't enter into it. On the other hand finding the
time to do it . . .

Another vote to buy, unless you're wanting something unique.

I went though the same decision process 5 years ago, and ended up with
the stamped steel door. It looks good, is relatively light, and won't
swell or shrink in the weather. I skipped the insulation, because my
garage is unheated, uninsulated, and is well ventilated.

Installation was ~ $150, including complete track replacement and
hauling away the old door.