If you are that concerned abut security, look at Viper alarms. Our preowned Sunstar came with a Viper alarm, which included remote start and the vehicle tracking you are looking for. Unfortunately, with only the side dorr, the door unlock feature was not implemented. I removed the Viper (it was a crappy installation, too.)
Or, get your amateur radio Technician license, and install an APRS tracker.
In either case, keep in mind that nothing has 100% coverage. Even satellite based units have trouble under trees.
2014 Sunstar 31KE
1988 Suncruiser 31 RQ
1968 Travco 210