You could buy my mobile drier, its a canadian one, electric and gasOuch. I was working on around £40 to get them from 30% to 15%. Once they are in a batch drier, it's just a bit more time & fuel for the extra %. I did ring Master Driers who hire out machines. They have a couple of electric drive machines coming back from Scotland. They also gave me a few phone numbers of local customers who might be able to help. £50 sounds excessive but this depends on the terms of your agreement. Give me a ring & I'll share the details of the locals who have these driers.