Question Unity MARS industrial application

I am looking to use MARS for an AR app to show live BMS content overlaid on real world equipment. The app needs to only work in the predefined real world indoor locations and accurately track each piece of equipment. I intend to start with ARCore but also make the app work on ARKit and Hololens.
I want to know how best to achieve the localisation and tracking of equipment and what MARS features can help. So far my prototypes have used image tracking in AR Foundation, is image tracking still the best way to achieve this or is there a better approach to get the best results?