Yeah, well. Unfortunately no organisation in the Netherlands has its own place. So, even though the teachings are for free, one has always to pay for the rented local, and for food.
This retreat is, btw., one of the cheapest ones in the Netherlands. ;)
Dhammanikhom and Dhammacari in Germany have their own house, if I'm not mistaken. They do everything on dana principle, not just the teaching but rent and food as well, I believe.