When I try to fathom what lifestyle I can have with respect to my finances there's the shadowy unknown being unforseen expenses that arise when you're old. That would vary a lot. Some people go fast, others require assisted living and who knows what kind of expenses? How do you plan for those things? Obviously, unless things improve in the USA healthcare scene it's hold onto the gunnels and hope your boat doesn't take on water! Then there are considerations like moving to where your money goes further. I live where things are very expensive right now. Got my first Uber ride the other day and my driver was born in Columbia, has lived in the USA since 1963, mostly in New York, San Deigo now. In a couple years he'll move back to Columbia where he has a house and his $$$ will go a lot further.