Looking for a location to host a 7 day workshop

I am hosting a 7 day tiny home building workshop for the Cascadia community.  This is a non-profit event that is by and for the community to address chronic homelessness and the effects of housing insecurity.  

What I need:   A place to host this event in the middle of April.  Ideally this place has a barn to build in or a place to erect a temporary structure.  Additionally I need to be able to offer accommodations for 6-12 for that period of time.  I am willing to pay for the space and whoever is the host will have free admission to the workshop and all the amenities that go with it.