Thanks everyone, I was thinking of the worm factory- at wiggly wigglers, they are selling slight seconds at £30 a pop. So with the worms I would be looking at about £45. From the images this looks like it only has two trays, are three trays better? Can cooked foods also be placed in these, I thought cooked food on a compost heap was a no no, so what is the difference- or is it that rats cant get into a wormery?