Perhaps you aren't familiar with the prices that people pay for Yoga retreats? I'm familiar with the cost of making Ayahuasca, and doing it properly with reverence and respect can be a two day process so I am told. I don't want to argue about the cost, because at one extreme the ingredients only cost a few dollars, whilst at the other extreme it takes a few days to prepare properly and suitably for the occasion. Many people, including me, would argue that a t-bag version of Ayahuasca to take on the sofa one Sat evening with the girlfriend is not exactly the same as in a nicely prepared environment (remember scene + setting) with experienced and compassionate people around. A Yoga retreat for a long-weekend could easily set you back £500 ($800).....