Question Advice on setup for AR Trail

Hi.

I'm setting out to create an AR trail of a church. We have a 3D scan from Matterport of the space and I am trying to connect the dots to how best to go about the project. The trail will installed to a set number of iPADS, so no user downloads.

I am wondering which of the following would be the best option:

- User scans a fixed image in the space (we want to do this anyway) and it loads the 3D content to scale content around the user. This way I can block out columns, walls, etc as masks and place buttons or trigger points in the scanned 3D model.

- Use persistent AR with ARWoldMap. But is there a way to do that using the 3D scan or do I have to be on-site to place the anchors (possible but need to wait for Covid to clear a bit more).

I have UNITY MARS which I feel should be the solution but struggling to get started or read mixed things about his stabilityty. Any advice would be really appreciated. Many thanks, Darius