The bullseye system looks interesting, but the site says it is for use "up to 1,000 yards." The system he wants here is for use at up to 2,500 yards. It would be worth a call to see if they can do one for 2,500 yards and at what price.
My brother set up a system for me that we use routinely at 1,900 yards. I don't know the specifics of the HD camera or transmitter, we use two yaggie directional antenna mounted on inexpensive tripods talking to each other, and an inexpensive DVD player as a monitor. Since I can and do drive to my target point, I put a steel plate over my camera to protect it.
Never hit the steel so far, with probably 300 rounds down range over it. Even so, better safe than sorry.
Jeffvn