hummm $1000 for 2 car? not bad, I guess you are getting some sort of discount, since the other person payed $700 for just one car. If you are going to install it your self, which company/website have you visited, or decided to purchase from?
I choose the Invica-shield. Don't worry about making mistake, as long as the piece is still wet you can always pull it out and re-apply it on to the car. I recommand to get a one piece clear bra for the front bumper, I used multi-piece for my front bumper and had to spent more time making sure each piece fits perfectly so it leaves no visible line. However, one piece will require you to work faster, or else you'll have to keep on wetting the remainding section while working on the other section. For that large one piece you might want a helper for that. But a multi-front bumper section works just fine.
The other semi-difficult part I can think is the 2 rear-view mirror and the emblem piece. you will have to strech and spend more time to eliminate bubbles.
Ask them to send you a couple pratice pieces so you can get a good pratice. Also if you order pieces for the front grill section, start your installation with that it's the easiest one to install.