It is needles to say that one needs to check for any cracks, dents, scratches on the window glass, trim or the frames after installation.
It normally takes 30-40 minutes for each window to be installed which includes carefully removing the old one and installing the new window
Yes, your old blinds are of no use once they are removed from the old windows as they were of the dimensions with respect to the old window frames. Indeed you will want your sparkling new windows to have newer blinds indeed
The entire job of changing a door , be it a patio door or entry door could take from a few hours to an entire day depending on the location of door and kind of door to be installed.