Excmelin

If you're dead set on DIY, making a lightweight wood ladder could work if it’s only for quick access and won’t be holding much weight. A mate of mine built a simple one-tier ladder from lightweight timber, kept it narrow, and added an old hook to the top for stability. Worked pretty well for him. If you’re looking for something that’ll save you from the DIY hassle and give you a solid setup, lightweight ladders with wheels might be worth considering.