I keep running through this economic collapse thingy and come up with "best guest" scenarios. I keep coming back this: a cascade of crisis after crisis, but rather drawn out. Any come back to where we are now will be loooooong and slow.
The slower the collapse the better is the way I see it. Let us gradually revise our paradigms-like settling into a pool of cool water. It is more or less an awakening. As the book you read suggests fasting for two days, it will be a conditioning and awareness training brought to you by reality. Bread costs so much more, but it is available. Gas will cost more and there may be "shortages" from time to time. Marauders may raid local supermarkets and stores from time to time. Riots in the inner city. The only thing that really concerns me is general panic and random thuggery.
We will learn to deal with the food, gas, crime and general crap situations. But we will adjust - adapt, improvise and overcome. It sucks but we will prevail. And your step-daughter will too. The young will actually adapt easier.
FWIW
I was actually thinking about that on the way into work today. I thought about how during World War II they had to stuff old shoe does into their tires so they could keep driving. People adapt and make due.