Multitexture for Blender? Material for use of floor generator

Hello Again,
To begin, Thanks for your time!

So, im a bit of a noob with UDIM etc, but I guess the point with UDIM is that you UV unwrap the model and then assign different images from a folder?

But my workflow right now, is that I use Archipack Floor Generator, which is parametric and non destructive workflow. So I have this floor which I change in whatever directions and the boards follow.
I Made the boards exactly the same size as the different textures I have - that is 6m x 0,3m boards.
I have 12 different textures in a folder.

ArchiPack gives each created board its own color vertex attribute:

Should I change anything in your node tree to better fit that procedural workflow? Like adding the attributes somewhere?

This is guy uses the same texture setup as I: https://www.youtube.com/watch?v=MSyiXDueaHk

Cheers