I didn't get into tadelakt as I went down the micro cement route instead to accompany venetian plaster. As far as I'm aware tadelakt and micro cement are quite similar in usage regarding when it can go etc but the application differs a little. I wouldn't pay that much for a 5 day course though. I do a 5 day course in venetian for 600 quid. We teach micro cement too but once you understand the venetian, micro is pretty easy to pick up