im not sure about audio shops in your area, your on the other side of the country..
But...
You will need the following
AVIC-D3 (retails for about $999)
Car-side harness (you will need something like the METRA 70-1761 IF you dont have JBL) ($20)
Rear-view cam (i suggest the audiovox liscence plate camera also..its clean, stealty and has a wide angle..ive seen alot of them installed, and they work great) ($200)
Dash kit (not sure right now what the number is, but it will cost appx $20..they will give you a "double din" dash kit (just brackets...unless they can use the factory ones, which IIRC they cant use)
So $1240 in equipment, and parts
national average for labor is anywhere from 150-225 for in-dash nav install..
most retailers run appx $200..most are about $15 cheaper..
The rear view camera will prob cost you appx $75 in labor
so. $1514 for equipment, parts, and labor (APPX)