Kiln drying is very quick, can be done within hours. I am not sure what the wood movements are though. If you can get someone who treats your board because it is said that it needs 1 year of drying per every inch of thickness.
Have you tried to find a place where recycled wood is sold? Just like Bristol Wood Recycling Project, where I live. You can find good deals there and similar wood, large quantity of the same species if you are lucky too:)