I'm not familiar with Washington. But if you are close to Wilson Creek- Bohnet Farm is holding a field day/horse show its put on by the Washington State Draft and Mule Association. It is this weekend March 29-30. It sounds like an awlful lot of fun. They would be very happy to talk with you about Drafts, and I'm sure you could find a few in your price range, possibly a retired one for free.
www.wdhma.org
or
ptlivery.com [James is the president of the other organization]