full wiring harness installation help.

i have a full headlight to taillight painless wiring harness to install on my 318 74 dart sport.

i know i'll create problems down the road if i attempt on my own.
im inexperience when it comes to electrical.

im based in so cal (inland empire/san diego) so i decided i want to have reiss racing & restoration (escondido) do it for me as long as i can sit in and learn/know how to do, and know the car if something goes wrong down the road.

granted the wiring harness is provided, their qoute for labor and parts for anything i might be missing is gonna be $2,000. i only got 2,100 budget to get this on the road. and i still need to get a radiator and whatever other small stuff to get it on the road.

what do i do? the longer i wait, the less money i have.
i can't to afford to have problems down the road since it will be my daily driver.
and it being a daily driver i need it done right. (not by my me)

i've had the car for way too long for it not to be done already.