I'm pleading the 5th here.
But I can say that I've replaced the entire front end from bearing to bearing including all new brakes,bushings, radius arms,ttb, and every spring mount, body mounts and bushings. Also..new starter,radiator, belts,hoses,clutch,....too much. BUT..all of this work was brought on by the fact that the original truck was basically a rusted up turd.
In other words...if you were to buy a better platform, you wouldn't have to spend this money.
So...minus the above list.. I'd say
Shit load of tubing
Shit load of awesome fabricating
6 new tires
4 fox shocks
Fuel cell
Window net
Harnesses
3 hoods
8 fenders
4 front grills and header
Battery holder
Battery
Electric supplies
Misc..hardware and doodads
All the other stuff I'm forgetting
You could have a killer bro-lite truck built for 5k or less..depending on some things of course.
You could probably build one yourself for 3 k or less...depending on some things.
If you already have a seat, harnesses, maybe a fuel cell, then there's more savings....kinda of.
Point is...just build one and make it as cheap as you can.
And let's race...and make everybody else wanna build one too.
