Regarding the side on which the alternator is offset, and blade rotation... I think you have it backwards.
If the alternator is off set to the right side of the machine, then ideally the blades ought to rotate counter clockwise. (this is assuming you are looking straight on at the front of the machine)
and of course, if its offset to the left, the blades should run clockwise!
This doesn't have anything to do with furling. These machines with the common furling system will yaw more quickly one direction than the other in gusty winds.
Consider my 20' turbine. The alternator is offset to the left of the yaw bearing. Imagine the wind is mostly from the west and the machine is pointing west.. if a gust suddenly comes from the South, the tail will swing up first and the machine will slowly come round to point to the south and 'catch up' to the tail (this kind of looks like its furling but its not). If instead, a strong gust comes from the North, the tail cannot swing that direction so the machine will quickly yaw around to face north. In other words, if Im looking Down at the top of the wind turbine -it will usually yaw more quickly in a clockwise direction than it will in a counter clockwise direction.
So in the case of that machine - if its got counterclockwise rotating blades, the direction in which it yaws more quickly will cause the blades to be pulled in towards the tower. Better is to have the blades rotating clockwise so that in that direction of 'faster yaw' they'll be pulled away from the tower.
My 20' turbine originally had blades that rotated counter clockwise and they struck the tower twice on windy days.
So looking at our 10' machines, our book, and every single page I've made up about building a wind turbine you probably notice I have it wrong every single time ;-)
If you have enough clearance between the tower and the blade tips it doesn't matter anyhow. Hugh always tell me that he finds counter clockwise turning blades to be bothersome for some reason... but other than that it's not an issue so far as I know.