I had read somewhere (online), that the max run you want for a dryer line is 25'. For every 90º bend you make, reduce that number by 5'. That would make my max 15'.
I like the idea of the elevated exit on the rear of the house, as it will never be affected by snow piling up. I can't say that for the front exit.
Honestly, I think that I was just looking for a reason to buy the 18 volt Dewalt drill. [
]