Here is more info:

Right now we have a professional engineer doing a cad drawing of the final assembly. What we are planning to create is a heavy duty plastic frame kit for the window. It will involve 2 pieces that fit together with a few screws to create a permanent frame fix on the window. This will be waterproof and permanent and should only take a few minutes to actually install.

Once we have the mockup done I will provide pictures here.

P.S. It will not require removing the roof!