Will also be building a tiny cabin, that will be secure for storing them in, while we're away. Cabin will be off-grid, so it'll be more self-sufficient than any weekender cabin that has access to power and water. Front deck and porch roof will hinge down and lock, to cover the door and windows.
As for using metal ladders, I was planning around that, with either folding, or extension ladders. Just not willing to buy, when I can build better, cheaper and to fit, rather than some generic one-size-fits-most junk that was made by the lowest bidder on the contract.