Not to be the Debbie Downer of the PNW, but isn’t the point of this thread (for posters to show you horses for sale) sort of tap-dancing on the edge of violating COTH advertising rules? CANTER horses is one thing (don’t forget to check out CANTER WA if you’re headed north), but blatantly posting sales horses is a bit of another…
The FB group Calvincrowe mentioned would be a good resource for you. I doubt you will find something to purchase that is already tried-and-true at the necessary levels within your budget AND meeting age/resale requirements, but maybe a lease. I cannot recommend any horses personally, especially since you are purchasing with the intent to sell once you’re done with it anyway. Do none of your trainers have the necessary connections to check with the upper-end people mentioned? Most leases on upper level horses are going to come through personal connections rather than ads, from what I’ve seen!