I hear you ragkar. Believe me, I'll be in 4x4 all the way!
Here are some pics. Keep in mind that it is very hard to capture slopes and such with pictures.
Here a side shot showing the angle of the "not so steep part" with the 4700 pointing down:
Same position as above, looking straight ahead from the drivers seat (see why I want to drop these trees?):
Driver's seat looking down:
Looking back up at the house from the "not so steep part":
Looking up at the house from the very bottom:
A shot from a (slight) distance showing the hill:
As a bit of background, I have been driving tractors for 30 years, not for a living unfortunately, but my point is that I know tracters and their limit (except for this crazy drop). This particular hill is just borderline something I would just go ahead and do.