Actually the SDK *Development Kit* For the Wii is only $2000.00... Pricey at first, but actually very cheap if compared to others *30000 - 50000 for the ps3 * So, it actually wouldn't take to many sales for Hampa to turn a profit.
Since the Wii-Mote can be used as a mouse of sorts, he would only have to really port the game over... Finally, having that liscense and new found profit from such an AWESOME game he could maybe even begin development on a new AWESOME game...
The Wii is designed for everyone, consumers and developers
The best way to do this would be for the wiimote to act as a mouse. Using the motion censors will not work because you can't move your feet or elbows or chest. This is also highly unlikely. Nice try though :P
Its quite hard to get hold of a development version of a console. They tend to only be available to large development companies as they cost a large amount of money. This is because they will run any program/game which you put on it as it has no DRM or copying protection.
You then need to go through the right channels (Nintendo, etc) to have your game made so it will play on a normal Wii (DRM and protection added).
Basically, it is a lot of money. If you dont sell units to the point of 50'000 or more, I believe you make a loss. This is not a problem for big companies because they are going to use the development consoles for more than one game.