Couple of years back, there was an unfortunate incident, involving a low hanging roof eve and the front of my class c overhang. With a driver who shall remain nameless to protect the innocent.
It was an insurance job. I think it was around $4500 ish. Probably would be cheaper for private pay. I had them remove the window, and just make the front one piece. Following advice from this forum.
My only comment on the OP's plan, would be, I am sure you could do it, But you could really open up a hornets nest as well. In terms of getting everything to fit and sealed properly.
I would be tempted to take the window out and reseal it, Or take it out and fiberglass over it. Also If you take the window out you will need an new inside headliner as well. Maybe a case of if it ain't broke don't fix it.
Just my thoughts
