We tried shelves and racks...almost have to be overbuilt. Heck I threw away almost a ton of cardboard a week. Shelves bowing and collapsing is another storage nightmare. But yes..proper shelves are the cats meow according to my wise old friends. Johnny's vintage cycles..a trailer customer of mine went all out for inventory. Cost a small fortune. And I was impressed. There is nothing available on mainstream consumer market that can compete with commercial or smart thinking. Cinder blocks and oak planks will out perform most shelving.
This gets crazy at home unless you have a farm cat. The rodent issue can ruin a person and even their vehicle. We have tons of snakes in a dog hunting town. My bud the farm cat is my lively hood. But I like him and he has earned retirement.....so check local zoning, have a cat and leave nothing on the floor.