OK, so the gig-E router is really a switch. I assume that in your former location, the switch plugged into the router, as did the Mac, the NAS, and the network printer - only the two laptops connected wirelessly. Your problem comes about because none of the 3 (Mac, NAS, printer) are wirelessly equipped. An obvious answer is to get a wireless card for the Mac, & wireless print server for the printer. This would work fine if you leave the NAS in the bedroom, connected to the router.

You might take a look at something like this, designed to extend the wireless network. This might work very well. Otherwise, you might need to look at dual-band access points such as this. These will definitely work, but you need two ($250-$300 for both).