We bought the fowlers dehydrator. About a hundred bucks new on eBay. We could do with another few purée sheets ( the soft plastic round liners which allow dehydration of stews ets..). Make sure you get one with a variable heat setting. Dehydrating meat under 65 deg I think, is dangerous. Vegies need a lower heat setting.
My favorite dehy'd recipes...chilli con carne, spag Bol, any risotto, any curry provided meat is in small cubes and a cooked lentil dish like Dahl dehydrates very well. You will pay for the dehydrator in a few trips, compared to buying dehy'd meals. Please pm me for some more advice if needed...