There's doing things and then there is doing things right.
A 1jz is a big heavy long engine for a corolla, so you would want a driveline and suspension to be able to match the engine.
A hilux diff minimum the cost of buying it, converting it, lsd center, handbrake cables etc, thats over $1000 on its own and thats with drums, disc brakes even more cost. Then a big tailshaft to suit with solid uni's $600ish. A decent fuel system to feed the thirsty 1jz surge tank, pre pump, 044 or similar, custom fuel lines because the inlets on the other side and there aint much room in the tunnel especially if your going auto. Getting close to 3k already. Then you have to get creative with radiator and intercooler setup, you would want some decent brakes and full suspension if you want to be able to stop and turn and then the 100's of small things that go along with conversion that add up soo quickly. Engineering cost? Before you know it your doubling or tripling your original budget.
Then once your on the road what about teething problems, all the small pain in the ass figuring out problems that cost. 3k . . . lol at 3k