The devices are pretty easy to install, 3 wires (power, ignition, ground). Because this is heavy equipment, there's usually a mechanic somewhere nearby that can handle at least that.
I also make a version of the tracker that I pack inside a Pelican case and expose a cigarette lighter plug, for use on snowmobiles. Most people can handle plugging that in, no instructions required.
My local ski area has a couple of machines that they let me crawl through, so I take lots of photos of the important parts of the installation process, best places to place antennas, etc, and put them in an "install guide" PDF that I print and include in any shipments I send. I also wrote up a "how to test/verify that the unit is working" guide, and ask people to go through that before contacting me for troubleshooting. If they call, I ask if they've gone through the test/verify guide. If they haven't, I tell them to do that, then call back if it's still not working.
I also make a version of the tracker that I pack inside a Pelican case and expose a cigarette lighter plug, for use on snowmobiles. Most people can handle plugging that in, no instructions required.
My local ski area has a couple of machines that they let me crawl through, so I take lots of photos of the important parts of the installation process, best places to place antennas, etc, and put them in an "install guide" PDF that I print and include in any shipments I send. I also wrote up a "how to test/verify that the unit is working" guide, and ask people to go through that before contacting me for troubleshooting. If they call, I ask if they've gone through the test/verify guide. If they haven't, I tell them to do that, then call back if it's still not working.
So far, so good.