from the looks of the quote it looks like a very rough estimate,
is that for the whole job done at once? or each part done in separate stages? if it is done in one whole lot you will no doubt save money, it will be cheaper - as while the car is on the hoist the guys will be able to do the fmic and dumps at once..
also you must remember that the fmic you are looking to get is a legit japanese trust cooler, not any like the cheap copy chinese/ebay cooler you see around
as for the turbo timer i would definitely consider getting one if you are going to take your car for spirited drives
(which judging by the ebc, is what you are planning to do )
and on that note, it is my understanding that the quote on that ebc includes a boost gauge
im a bit bored at work, and thats my 2cents hahaha