I realize that this is a off-the-wall question.

I know of no camera speed color films are manufactured larger than 11x14. Might it be possible to expose a clear base color display material such as Kodak Endura Classic or Ilford Ilfochrome Classic in a 20x24 camera (outdoors), develop in RA4 and then use the film as a negative to make prints using a contact frame?

A few thoughts:

(1) The base color is different, therefore the color correction is going to take some serious color corrections over the light source when contacting.

(2) Using print material is going to require a long exposure.

(3) The cost of these materials is far cheaper per square foot of material than camera film. Ten sheets of 20x24 film is $90 at B&H.

(4) The contrast is different that camera films.

(5) These materials are manufactured in sizes up to 50" by 100ft rolls allowing someone to make huge images if they have a lens that has the coverage.

After you tell me I am crazy, please give me your thoughts as to how this idea can be made to work.