IP address only matters if you have the hardware to connect to the internet.
Ive seen target systems that communicate to the master display via, wi fi, blue tooth, VHF, UHF. All with pros and cons. Communication is easy. Staying supersonic at 2k is the hard part. Also, the detection zone of the equipment needs to get larger. A 3x3' detection area is fine for most. 5 MoA spread at 500m is only 2'. At 2k its 8', so with margin of error youd want a 10x10 detection area.
Steel is nice, easy , cheap and simple. But you get what you pay for. Steel wont tell you where you hit, or which direction you missed, and at 2k you might not even hear impact.
The military has targets for this, but $$$$
Virtually all accoustic detection systems have the supersonic issue. Optical trackers dont have that problem, but they have their own problems (dont usually work at night, weather dependent, keeping lenses clean).