You don't print a mesh banner on a flatbed printer (well, you could, wouldn't make much sense though). Outsource the job to someone who can do it the right way. You don't want to do this in 4 panels with mesh, it'll look terrible.
+3 for Merritt Graphics.
SJM, so RF welding mesh is no problem? How's the strength. I dropped off samples locally but I guess they never got to testing it. Any idea the costs?