That is pretty far for G or N with an omnidirectional antennae.
You won't really get a reasonably priced "out of the box" solution, you'll need to put a couple of things together. What you will probably need for good performance, if you have line of sight, is a directional antenna on your end aimed at his directional antenna, something like: http://www.newegg.com/Product/Product.aspx?Item=N82E16833995096
I used a pair to get a signal to my guest house and it worked very well.
I wish I had neighbors that would spend even $1 to help me, much less $140.