I have housebuns and they have a home base (cage) plus free range in my room. Most of their things are in plastic containers. Pellets boxes (for both guinea pigs and buns), spare bowls, boxes with shampoos/medicines/general animal "stuff", dust pan and brush, excess toys and spare tunnels are all in one smallish cupboard. All of their hay is in plastic containers (65L) that stack beside their cage. Carriers get dismantled and slide underneath my bed when not in use. As cages (mainly guinea pigs as buns now have carpet) are lined with fleece and towels, I have alotted 2 shelves in the linen cupboard to storing all of their fleece and towels as well as cozy saks, cuddle cups and other fleecy items that I predominately have for the piggies.