Wireless N will still have to go the same distance and through the same walls. 100-150 feet through walls actually IS fairly far for a home level wireless router, mainly because of the walls, so it will be tough.
Now, some Wireless N routers *may* work, but not because they are specifically "N" but because they are newer and may have better signal handling and power capabilities, so don't let that deter an upgrade.
Is there any way to relocate the existing router to be more centralized? Or to have it travel through 1 or more less walls? A wireless extender will work, but if we can save him from having to spend the money, I am all for that.
