Great show. I've seen series 1-3, and I don't think it has overly much life left in it, but all three series are worth watching. Personally, I love Doug the crazy councilman, he gets funnier and funnier. And Mary LP gets hotter as the show goes on.
However, you've got something wrong in a big way - where do you get the impression she's wealthy? She's not at all, that's why she's selling the weed, so that the family can stay afloat financially. If that hasn't already been made apparent then it will be.
Martini, that's an interesting comment because I like the way they take the glamour out of selling pot as the show goes on and demonstrate what a ed up world the drug supply business is, and how dangerous it is.
Other awesome shows from the last few years - Californication, Dexter.
Oh, and if you like cop shows, go back and watch Homicide:Life on the Street again - it is pure class and only gets better as it goes along. The writing and acting is brilliant.