before we start putting any money, i would advise that we make a project plan. The project plan should have the list of all the components that are needed to build the 4x4 (based on what is available in the market). We shall identify the phases of how the build has to be put together so that money can be arranged accrodingly.
For example first phase after having the project plan completed is to have a suitable chassis (not necessary FJ, but anything other than CJ). Once the chassis is there we can start fixing it, making the body, engine and suspension mounts, rust, primer, paint, e.t.c. The 2nd phase can be getting the engine, steering, differentials, suspension, brakes, tires, rims, e.t.c (all the mechanics), then placing them onto the pre-built and fixed chassis.
3rd phase can be electronics, interior e.t.c. 4th phase can be performance modification and tuning e.t.c
Just an idea!