I doubt that it is even possible, let alone instantaneous. This thread I believe contains wildly optimistic guesses.
I think it is possible with the caveats:
1. It depends on how you count.
2. It depends on where you live.
3. It depends on what you define as "needs".
Per #1, if I exclude my kids (I plan to have enough for them and their college set aside before I retire), include a paid off house (I plan to pay off the mortgage before I retire), and subtract off work related taxes, I am fairly certain that what's left is only about $15K annually, if that.
Per #2, I live in Idaho. I would doubt anyone could sustain my (admittedly boring) lifestyle in NYC, San Fran, Seattle, etc. There appear to be other cheap parts of the country, though, including the South and South central US. My property taxes are roughly $1K annually, for example.
Per #3, the $15K of my budget alluded to above is almost entirely the basics: food, clothing, utilities, auto, insurance, etc. It does not include replacement costs / sinking funds, does not include any significant travel, and has a modest recreation budget. But neither does it include bartering for things or shooting and eating squirrels.
When I get home in a little bit maybe I'll post my actual Quicken #'s for the last six months.
2Cor521