@ Anon2250- If the log home look is not your style, there are other very reasonable priced options in a more modern type of home. There are websites that have directories of architects and design firms worldwide that offer prefabricated, ecofriendly homes.
One kit home that I know of is called the LV house and it costs around $35,000 for the kit. The company is out of St Louis and they will ship the homes anywhere in the U.S. There are also companies that design micro homes, and rooftop lofts that can be perched atop the roof of tall city buildings. These homes are complete, only needing to be lifted up by crane.