While you're waiting for a decision, you can use a
wagon—it can hold up to 20 items and takes up little space. It's not the same as a dedicated log storage structure; it doesn't look as pretty, but it saves space.
As for keeping it from rotting, I don’t know.
It would be interesting to see a separate log storage structure that uses slats (rollers) to raise the logs to the next level, so that the number of logs and rows increases depending on how full the structure is.
I prefer the option where they're stacked on top of each other (like sausages in a package), forming a triangle, as it looks more natural and beautiful than the "fire" or "grate" arrangement. And from a storage standpoint, it's easier to roll them up without using machinery—using two inclined logs.
My english is bEd.