The KA is about as cheap motoring as you can get as long as you keep ontop the rust.

Ive just got wishbones, arb bushes, track rod ends and drop links for a total of £60 all in. Sure not ford parts but plenty good enough and reasonable brand.

If you can weld, the rust work is cheap too. Sills can be had for less than £30 each, quarter panel £20 etc.