I just finished making new Bi-Fold doors for the front of my shop. Back when the FD modified the front so they could park an engine in there they made doors that had 2' wide hinged sections on the bottom and the doors were 5' wide and swung out like barn doors. The new ones have 3 sections. One side is 6'8" wide, it folds in the middle so it only extends out 3'4" instead of 5' On the bottom I made up a folded rubber piece so it can open over the 6" rise of the apron. the other side is one 3'4" piece that opens out like a standard door, It is just 8"4" tall! Looking at it from outside it looks like 3 panels.
Of course looking at your carport I would almost say to jack the outside up front and back and only leave a shallow slope since you don't need a high load. To make it easier leave the lower sections of the wall alone and just add the new pieces at the top and install some clear plastic for more interior light. Then hang the cut down door.