I really don't think that the shaman has got enough money to pay for the kind of lifestyle that Märtha Louise is used to. ML is one of several examples of royals, who grew up being used to a royal lifestyle and then as an adult, not being the heir, have had trouble financing the way they like to live. She has not pursued the kind of career that could pay for it and she has not married rich - not the first time and as I said, I really don't think the shaman is that rich either.
He probably has a comfortable upper middle class lifestyle or something along those lines but I just don't think that he can finance the upper class life that ML is used to. Yes, he is schmoozing with Gwyneth Paltrow and some other Hollywood people, his "treatments" or "consultations" seem to be expensive, but he is probably not a multi-millionaire.
He doesn't even own a house or apartment. This is mentioned in the Vanity Fair interview, where Märtha Louise says that her Norwegian friends found it strange that the shaman does not have a permanent residence but lives in changing apartments rented via AirBnB.
I think this would also be an issue, even if Märtha wanted to move to California with the shaman (and she probably does), where would they live? She has 3 children who are used to living in a big house and probably each have their own room. The Los Angeles area is expensive...
I don't think the shaman could afford all that ML is used to: a nice house in an expensive area, the horses, the travels, etc etc.
I don't think ML is strategic about marrying the shaman or someone else for money, or even about using her Princess status to earn a very large amount of money. Certainly, she is aware on some level that she should be earning money and she has used her title & status to earn money (though I don't even think that all of this title business is about earning money. I think some of it is also just "I was born a Princess, so of course I will call myself a Princess.") But it has never been strategic and cunning enough to earn her enough money to live the lifestyle that she would like.
I think on a certain level she is simply spoilt and unrealistic, as some royals are. I mean what is the worst thing that could happen to Märtha Louise? Getting into so much debt that after selling her holiday house, she'd have sell her other house as well? Then what? She and her children would probably be moving into Oslo Palace or another one of her parents' estates. Oh the plight of that