Thanks for those tips.
Location is north Scotland, 30 odd miles south of John O'Groats. I have a few customers who may want to fly in. If I can get it going, any spare capacity can be used up by ppl visitors. Yes, we do first rate tea/coffee, up here we have too.
If the ground was level enough, I would put a 1km strip in for fixed wing, but its just not viable.