I've been interested in scale models of the solar system (or other astronomical systems like say the moon system of Jupiter) for a while, partly to try to teach my kids stuff and partly just because I think they're cool.
My opinion is that this solar system model is too big to be useful. If you're trying to teach people about the scales of space, I think you need something humanly navigable, ideally something where you can see with a single sight-line back to the previous object in the model, or, failing that, where at least you can walk between elements of the model in a short enough time that you can kind of keep yourself on-task and thinking about the model for the whole walk.
My opinion is that this solar system model is too big to be useful. If you're trying to teach people about the scales of space, I think you need something humanly navigable, ideally something where you can see with a single sight-line back to the previous object in the model, or, failing that, where at least you can walk between elements of the model in a short enough time that you can kind of keep yourself on-task and thinking about the model for the whole walk.