Hmm. Am I wrong to think that some people here are spoiled? $2,000/mo is more than many people in this country live on. Here in Oregon, one can rent a nice 2 bedroom apartment for $700/mo. $300/mo for food, $150 for utilities, etc.
Aside from health insurance, this is very doable. If you want to travel, stay in a hostel. If you don't want to rent, you can buy a condo or rowhouse for $200K and get a reverse mortgage when the time comes.
Personally, I get a bit cranky when I see people scold anyone who dares contemplate a lower-middle class drawdown. Heaven forbid the thought of wearing levi's and enjoying a burger and beer with friends at the local sloppy joe's. Leave the $50 bottle of wine on the shelf and find a hobby that doesn't take you to the mall.
When you factor in social security, I'd say $600K will allow an otherwise happy 50 year old to never work again - or work only sporadically.
Jon