Wow that's quite a big tunnel !
You should be able to grow loads of stuff. I'm no expert (my tunnel's still lying in the shed til I can save up for a cover!)
But what I'm hoping to do is section off 4 big beds for working in a crop rotation plan for tatties, onions, roots & brassicas etc as well as a large dedicated asparagus bed (mmmmmmm can taste it already!) And a few other bits for tomatoes, peppers, cucumbers and more 'tropical' stuff that wouldn't survive outside up here (it's quite an open site and at 1000ft above sea level gets the worst of the weather)
I'm afraid I'm no help for the fodder seeds - but ebay seems to sell whatever you can think of so I'd check there.
When I looked for topsoil for laying my turf I found
http://www.rolawndirect.co.uk/?url=products-topsoil&tck=Adwords&gclid=CLaznO7jqZgCFQUWGgod51momw but they were expensive so I opted for a local guy (who was about half the price)- but there's no way it would have been good for veggies, full of stones and quite heavy clay soil. So can assume that you get what you pay for and good dirt costs a lot of money.
Depending on how quickly / cheaply you want to do it you could pen it off, put a couple of pigs in for 6 months and get composting in the meantime - more work but less cash than buying it in.
Good luck with it and let us know how you get on !
Karen
