If you are looking for a Hotel to stay at, I don't know how expensive the prices are going to be, but you may have no choice, and the hotel rates in Manhattan are pricey during PhotoPlus Expo at Javits in Manhattan. If you are planning to come to Set Shop Annual Basement Cleanup Sale or want to meet with us these places would be the best choices to stay.
After you finish a day with PhotoPlus Expo at Javits Convention Center you may enjoy touring through Greenwich Village (West Village) and stretch yourself to Chelsea Market for a cup of coffee. If the evening is nice, you may take a walk on the High Line to see a beautiful sunset. Before going back to your hotel you may stop for drinks or inexpensive meal in Meat Packing District (West 14th Street). The next day you may try the East Village. Here you find ethnic foods, but young people will come out after 10PM. If you are not part of the young crowd, you certainly could get in any restaurant without reservation for an early dinner.