I went out looking at some land in a small village called Kalisada yesterday. Foreigners are looking for more and more quieter places to live near the beach, and Kalisada looks like one of those few places where you can still buy beach front property in Bali at an affordable price.
There is even an eco village under construction which is due to open next year.
The Batak style house is based on traditional houses found around Lake Toba in North Sumatra. Lake Toba is generally fairly cool at nights, so I think transporting the style of house to north Bali where is hot and dry, is a little impractical.