The banner looks a real professional job. The artwork, the text, the colour quality, the material, the size, all point to this taking more than a couple of hours.
When you've put this much ink on this kind of material how long does it take to dry?
PS It doesn't look like strips have been sewn together, it looks from the way it hangs that it was made all in one piece.
Plus this is four colour printing:
"Has your printer ever called you to say your job will be a day late because it is taking longer than expected for the ink to dry? What should you know about ink drying time to help you plan your printing schedule?
First of all, understand that your printer is making a reasonable request. It is prudent to let ink dry before folding a job to avoid streaking or "offsetting," in which wet ink smears or transfers from one sheet to an adjacent sheet. Some inks dry faster than others, as do some substrates such as synthetic and plastic papers.
Heavy ink coverage (solids and bleeds) on uncoated paper or matte stock take longer to dry, particularly if the ink mixture includes any reflex blue. A print job also dries more slowly on a humid day."
http://www.printindustry.com/newsletter_37.htm