Bearded Man:
We aim to save $80,000 per year ($20K per quarter). We invest it all.
I have to admit that we're not especially frugal with our money but because we live such an austere life as it is, neither of us are bothered about the money we do spend (assuming our $80K savings quota is met of course).
As far as living arrangements go when we retire - that depends largely on the amount of money we'll have and how the investments have done. The loose plan now is to buy a log cabin in the North Georgia mountains and spend 3-4 months each year travelling around the UK and Europe in a caravan (RV). I am a dual citizen and my husband will soon be able to take his US citizenship so he will be dual as well.