Having spent more than four years build my truck, I can honestly say that it has been good, sometime frustrating, sometimes wondering if I will ever get it finished. When I look at what I started with, go back to my build threads and blog and see how far I've come, it gives me the motivation to carry on. When people come to visit and are genuinely impressed by what I have done, then I feel a sense of pride and accomplishment that would not be there if I had just forked out money for other people to build it or just bought a finished one. It is my truck, exactly what I want it to be, with very few compromises. Whilst it has taken me longer than getting it done "professionally" finding true professionals in Australia is very difficult, and based on the disappointments I've had with getting work done on various other project, I did not want to hear the standard excuse for poor workmanship. "Well, that's best we can do", ever again.
I am currently rewiring the truck, circuit by circuit and it is as if I'm breathing life back into it. I did all the head/main/spot/roof light wiring yesterday, and switching on all the lights (there is a lot of them) and it was a great feeling that I had done it. Enjoy your build, it might take longer than you think, and if you get disheartened, take a break, look at what you started with, and then carry on.