Hi, I was doing Ayahuasca Retreats with Inner Mastery - the head of the organisation is Alberto José Varela. If you click on "Beyond Inner" at the top site of your link and scroll all the way down, there he is. They do a lot of conscious work and also a lot of retreats all over europe with different kind of psychedelica. In my opinion they do a great job because the facilitators get a good know-how how to handle the nights. I had many awakenings and other insights in those nights.
They charce about 250 EUR per night, if you stay more, they charge less per night. You get an accomodation with sleep space, the substance ayahuasca (additional other substances p.e. Bufo Alvarius, Yopo, Rapé...), food is also inclusive and you stay with some facilitators. If you have questions during the days, they are there for you. And in my opinion the greatest thing is the integration after the night. Really important.
I am from Switzerland by the way :-)