Found this while surfing the 'net , dunno if it's been on here before :
The Henrich Focke Wind Tunnel - yes, the founder of Focke-Wulf and Focke-Achgelis
Henrich Focke's Windkanal
Focke-Windkanal - Technical Data
They charge 950 euro / running day , 475 for set-up days.
Or a bit less for private persons, if the project interest them ;-)