Justifying a wide format printer purchase

I took an Epson training class today on the power of signage to influence consumer behavior.  Below are the three slides I found most interesting.  I’ll try to link to the source, Printing Impressions, later:

Epson’s 24″ printer costs just $2,495 with current promotions.

With average ink coverage, the 24″ printer can pay for itself in as little as 55 2′ x 3′ posters!