nice job Mad
How far along with it are you? Built one with a mate a while back and its an awesome machine for the money. We did it around the 2.0l sierra for the disc brakes etc but ended up paying just under £200 for the right sierra delivered.
Somewhere to build the thing is always the hard part
Sdp, you actually dont need many specialist parts for the 2B car (a pipe bender for the brake lines and a rivot gun is pretty much enough beyond socket sets, screwdrivers and some grazed knuckles). On the other hand the locost car (the £250 from the book) would need welding equipment and a fair amount of other things as you buy the steel box section and then have to weld up the space frame chassis. The front of the book actually tells you all the required tools at start...
If you were to actually try to make the homemade version and arent a professional welder Id suggest you skip stage 1 and buy a chassis premade. Plenty of the cheaper kit car manufacturers make chassis that would work. Buting a chassis from robinhood or similar would not only mean youre sure the thing is solid and safe but itd also likely improve handling as itd be a lot more rigid for the weight than youd probably manage yourself.
Kit cars are awesome fun to build - if you have the space and the patience to make things then do it
PS: They cost absolutely nothing to insure too as theyre classed as specialist