I bought one of these after Casey Mikes showed me how it worked on his car. Pretty easy to use. Buy the unit and then a SIM card. I bought a SIM card that has a year of service for 60 bucks. The app is free.
TKSTAR Hidden Vehicles GPS Tracker, Waterproof Real Time Vehicle GPS Tracker Anti Theft Alarm Car Tracking Device Strong Magnet For Motorcycle Trucks Support Android and IOS TK905
https://www.amazon.com/dp/B01N6H70C9..._TLwSDb166K8FW
You can have it send alerts if someone so much as wiggles that unit or put up a geofence to alert if it moves out if an area. Real time tracking works well on the free app.
It has a pretty strong magnet on the case and the battery lasts for over a month at a time. For about 100 bucks you can have some piece of mind.
You can move it anywhere at anytime. I stuck it on my golf cart at Indy just to find out where my buddies were when they borrowed my cart.
On top of that I recently signed up for Hagarty insurance through Superstocker Don Kennedy. If you get tired of worrying about some mal content stealing your car, that insurance is inexpensive piece of mind.