I don't waste my time on free plans, store-bought sheds, or ready-made, mail order kit solutions... been there, done that. Free means lack of user feedback and you get absolutely no customer support. With store-bought and ready-made mail order sheds: they're flimsy, profit-driven solutions that I've always had to tear apart and modify too much to get the storage space to work or to match the character and style of the home.
Working from ladders is more dangerous than working from scaffolding. Plus, having to constantly move ladders around is time consuming. When you get to the roof construction, consider renting a set of scaffolding with wheels. You’ll be amazed at how much easier it is to have a stable platform to work from and to set your tools and materials on. You can rent a 5-ft.-tall section of scaffold with three planks and wheels for about $110 per week.
DIY Shed Plans