Well there happens to be a WUG kit priced in that range.
What this kit includes is the
Routerboard 433 + 3x mini PCI slots + 1 mini PCI wifi card + adapter to external aerial + 1M aerial extension + 27dBi grid + 3 ethernet ports. Assembled, tested and includes weather proofing too!
Check out
here.
Since you will be only using 1 mini PCI slot, it will allow you to connect to the WUG. You still have 2 mini PCI slots left. Which means in the future if another neighbour wants to connect and see you as a way to connect to the network. Then you can extend your self into a access point by buying a additional mini PCI wifi card + adapter + external cable + grid or sector.
You don't have buy that product. There are cheaper Routerboards (RB) like the 411 with only 1 mini PCI slot + 1 ethernet port. Cheaper, but you can't expand. Or you can buy Ubiquiti, or anything else that works in the 2.4GHz or 5.8GHz spectrum.
The benefit with these Routerboards are that they are made for outdoor use, they work over clear Line of Sight ranges up to 30km known so far. Ubiquiti seems to fall short.
The Wifi cards themselves can do 2.4GHz or 5.8GHz, it depends on the aerial that you buy. So if you bought a 2.4GHz but your only WUG AP that has Line of Sight to you is 5.8GHz, you need to buy a new 5.8GHz grid.
Logon on to irc irc://irc.wug.za.net join the channel associated with your area and have a chat. There are some that will bend over backwards to get you on to the WUG.