Anywhere from 3-6 months at a time, twice a year.
We moved when I was 13. We all knew it was a permanent move. Except for my mother, who was is still convinced that we live several states away. So we had to regularly visit our "real home." We had to leave a beautiful 3,600 sq.ft. house on an island for a 700 sq.ft. little hovel that's falling apart several states away. For months on end.
And, naturally, there was no internet. There wasn't even any form of AC. I had an oscillating fan in my room. Dad wouldn't pay for it because it was a "vacation home."
It was no vacation. My mom's actually really mad at me because they're going back there in a few weeks.. I'm 21 now - I'm not going back there to live in a **** hole in the middle of nowhere, and you can't make me. :P
Regardless. I had my 360 and my Gamecube. I was going stir-crazy because I don't have any friends up there anymore, but in regards to the lack of internet, it was fine.