I think these amounts are over inflated. In today's world that amount could be in land (which is very over inflated).
Landon talks about the fact that she didn't get any money when she got divorced and her Dad tells her she needs to get a job and make some money. She's very outspoken about how 'poor' she is.
Cameron didn't have much at all when she first showed up.
I think these amounts of money are very over-inflated. If anyone took the value of their house, their car, etc, one could inflate it so they are worth X amount of money.
Thanks for posting this, I did find it interesting.