2d Grids- Would Pro be worth the access to Layered Grids in the following?

I am using tilemaps and I am utlizing A* Pathfinding for the navigation of the characters on the map. I will have mutliple tile maps for ground level, basement 1, basement 2, basement 3… etc. They are stacked on top of each other seperated by the z axis. Now I have a layer for my obstructions for the ground level. In order for the Agrids to detect the different obstructions on basement 1,2,3,4… I need to setup a new layer for each level. this would limit my levels I could have. I do need to have the A grids in place and cannot move them and I cannot move the obstruction tilemap with the obstruction layer. How I have it now works. But if A* Layered Grids could use one obstruction layer and be able to detect that the 2d tilemap collider is on a different z axis that would help my project. I am okay with the limited levels but would be cool not to be bound by that.