Large paper size jpg export

I’m creating an image from a sketchup model for a large advertising sign, 8’ wide. The graphic designer wants as large of a file as possible to keep up the resolution. I’ve created a page size of 8’ wide and have imported my viewport from sketchup. All looks good until I export the jpg or png, the export is just a blank page. Is there a better way to do what I’m trying to accomplish. Thanks in advance.

You probably don’t need to make it that large physically. Instead increase the pixel count. Maybe something like 300 or 600. Usea PNG instead of JPG to avoid the compression.
Screenshot - 12_23_2020 , 11_16_36 AM