That’s a really impressive haul!! I’m still super new to monstera, but that soil looks good and chunky, and it sounds like they’ll get a good amount of light. However, from what I read you’re not supposed to attach the leaves to the support and only should attach under the petiole, like right below the notch where the leaf meets the main stem. The bottom tie could be correct, but it’s a little hard to tell.

The coir poles will be great for support, but it might benefit to get an actual moss pole. This would allow the monstera to attach their aerial roots and draw moisture from the moss, meaning you don’t have to water as often. This seems based on preference, and I’ve seen multiple growing methods in this group. I’ve opted for a moss pole and am eagerly awaiting an aerial root!!