No way should you pay anyone to do it for you. it's really extremely easy!! I have done it myself without any previous experience at all and got it right the first try.
The only thing that happened to me was that when i went to put my speakers in the back--the wires were somehow not hooked up!! 99.99999999% of the time they'll already be hooked up, but the guy who owned the car before us was a little weird, and i guess he removed them (no idea why!) but it was a simple fix, i just got new wires, and ran them under the carpet and through the doors to the back, and plugged them into the socket. worked great!
if you go to plug in the console, and it doesn't plug in easily, it's because you need to go get an adapter thing for your car. go to wal mart and look up the make/year of your car, and they'll give you a thing that plugs into the thing in your car, and it has wires that are labeled, and you just match the wire colors to the wire colors, twist them together, and cover them good with electrical tape. you don't even really have to buy the adapter if you don't want to, but it makes things easy to plug it in all at once so you don't have to connect them while you're sitting in your car.
at any rate, i'ts super easy and self-explanitory, way less complicated than i make it sound. all your stuff shoudl have instructions, just follow it and it will work. the only reason to take it to someone to do it professionally is if you try and it's screwed up or if like me someone took out the wires and you don't want to put them in yourself.