Brass wire bending
Echo the points about annealing (especially like the vertical bit - I'm looking forward to using that). For the bending jigs, I've used square section Balsa - Yep it does work! You can use tacks or the like to mark out your bending sections at very low cost, it's forgiving enough to move the pin/tack if you've made a bog up in the layout, but sturdy enough to make a low cost three dimensional bending jig. I should add that you can amend the material depending on the wire gauge - you might need to use 25mm Sq. planed wood from the warehouse sheds, but the principle holds - 3d at low cost.
Hope it helps
Andy