From what I've heard, the self-building courses r good. I'm not sure if they're worth 20-50K. Other than that the whole business model is a pyramid scheme designed to benefit the ppl on top. Businessu'n mitserew, sew bemamtat nw, kezan lante commission yisetkal plus some benefits/points(if u are eligible). If u are willing to invest ur time and money, it's doable. Otherwise, it's just a waste. Minim bihon gin the business is done pyramid-wise but they'll try to convince u and make u look stupid if u say this to them.