If the house next door is a mate and friendly, then I'd be inclined to buy a long Cat5 cable and run it to your place. If it won't reach that far, is there an outbuilding where you can attach a Wireless access device to a Cat 5 cable from his router?
Technically, going between buildings, you should use fibre, not copper.
It's not that much more expensive... especially with the short distance enabling you to use multimode and transceivers with cheap short distance lasers.