A house in a dream often represents the self. Since the houses you saw were very dilapidated, they might represent parts of yourself that you think need to change. The fact that you were dreaming about America might just have to do with reading or thinking about America or someone or something American in your waking life.
You might want to check out the Colours and Dreams page in the Dream Themes section to find out the symbolism of the yellow and blue house.
The woman's washing line continues the theme of dirty things that need to be cleaned up.
Money in a dream usually represents something that is valuable to you, not necessarily money or even a concrete physical thing.
The children probably represent an ability to learn new things, to adapt to new situations. Since young girl took the useful part of the money--the bar code--from the old woman, this seems to me to indicate that you won't be able to change the bad or unsatisfying things in your life unless you try to think in new ways and adapt to new ways of doing things.
Dreaming about aspects of your past, in this case your childhood home and old friends, can often symbolize a desire to keep things as they are, to be safe and comfortable.
So these dreams might indicate that on the one hand, you want to change something in your life, but on the other you don't want to risk losing the safety and security that you have now.
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