Also, if you are going into personal buisiness with this, i.e building to order, i think you need engineers reports with every unit you build if it is on a small scale, and if they are to be sold to the general public, they will need crash testing reports before you can sell.

I might be wrong, but if not, your looking at a lot of money that can go tits up if you don't get it right first time around.

TBH, a lot of peeps have had this kind of idea over the years that i have been in the motor trade, and i have never known anyone make anything out of it, sorry.

Bodywork, is the thing to get into IMO. But you need plenty of capital.

Good luck.

Oh, and your Avatar. Brilliant for a mobile; but not next to your name on a forum. Sorry, thumbs down from me.