This is the tragedy of the current US housing market. No lavish nest egg to cash in.
House becomes just another living expense item.
And that was what made me start this thread, seven pages ago. Americans are unique in generally believing that a house is their best investment, that renting just means throwing your money down a rat hole, etc.
It sounds like most people on this board have been very prudent, which is wonderful. OTOH I keep meeting people for whom their house is their only "investment" who were counting on downsizing and relocating in order to retire. In many cases, not gonna happen, and with the new scandal over foreclosures more unraveling of the RE market may be on the horizon.
In my case, the right answer for now to "how much of net worth to tie up in a house" is none. Happily renting here in Mexico, would only buy here (or in the U.S.) if a perfect place representing less than 10% of net worth dropped into my lap.