Even if it wasn't the actual place (it isn't mentioned by name), there were places like that. They're all trying to feel better in the workshops. To me it seemed pretty clearly a New Age group therapy of sorts.

Quite a few of the products were real products. Conrad Hilton was a real, historic person, for instance. The real McCann twitter feed actually reposted the commercial last night congratulating Don for finally coming up with a good idea for McCann (that coke commercial).

Betty's brother wasn't loaded and wanted to live in the house. People get crazy when family members die/are dying. I've witnessed similar fights over who-gets-what once the parents are dead before.