Electric sunroofs start around $800 for the type that extends outside the vehicle so you don't loose as much headroom to $1100-1300 for the slightly deeper but narrower roof that retracts inside the roof. Holandai Webasto's are the top of the line and are the same mechanisms used in factory roofs. Make sure the installer is knowledgeable and offers a lifetime guarantee as the roofs are warrantied that long.

For a rear view camera system, the sky is the limit. You can do a tiny screen and a cheap inside camera for less than $200. I can offer a rear view mirror with a good exterior low lux camera for under $500 - see my web page.

I also have a 4" screen (with a TV tuner builtin) in a mirror with interior camera that mounts on the rear window and automatically comes on when put in reverse for $450. I used it for a month until I was able to do it even better by adding a Panasonic 7300U 7" screen with built in TV tuner, DD player, MP3 and auto reverse switching - but this was a BIT more than $500....