Posted: 10/02/2015 at 18:40
You mention 5 ft beds. IMO that's too wide. The whole point of raised beds is that you don't walk on them and at 4 ft it is easier to reach into the middle from the sides to tend the plants, weed and sow.
??70 seems a bit OTT. Are you sure you are growing crops that are that valuable? Our last bed was constructed from old scaffolding planks at ??7 each.
But you're right the cost of suitable soil is high.