I just got finished wiring up a 5000 sq ft building with wireless. Simplistic. I had them buy a Linksys router and a 7dbi antenna's. This provided pretty damn good coverage for most of the first floor. Only in their case I used wireless access points jacked into their LAN network upstairs. In your case, I would recommend getting a Linksys router and a Linksys range extender. You should be able to pick up both items for just under $120. You would obviously configure the wireless router and then you can use a CDROM to configure the extender. Really easy and you can't go wrong with Linksys. I use Netgear wireless router at my place. The routers work fine, but the wireless cards suck. I am about to switch over to a Linksys card because I've heard way better reviews for Linksys. Linksys uses all Cisco chips/hardware which I trust a lot more than Atheros or any other wireless chip companies.