Well, I found some wood today for the raised bed. It should end up about 9m long, 1m wide and 30cm high. I think I am going to bite the bullet and get a bobcat to dig the clay out of the whole yard, and I'll get some fruit trees in as well. So much work to do.
Around my sole garden bed, I'll leave a 1 metre gap and then put up a chicken wire fence to keep out the beagle and the rottie. I'll use star pickets as the posts, and thread some heavy gauge wire between them to hold up the chicken wire. On the fence behind the bed, I'm going to hand a 5m length of PVC pipe for strawberries and maybe some herbs. I've already drilled drainage holes in it, and will cut a strip off the top of the pipe into which the dirt and plants will go.
Now I just need to buy chicken wire, star pickets, rebar or stakes (to support the timber walls of the raised bed), and the soil to fill it with (about 2.5 cubic metres).
Any tips on where to get that stuff cheaply, and even a cheap bobcat/dingo place?