Do you have room for another piece of furniture? If so you have a lot more options. Cabinets, a rolling kitchen or bar type cart, and more. Even those metal like shelving units, if put together correctly, work well and can have wheels put on if you want.
Otherwise, what can you lift easily. If not much then you may need a 2 part box like structure. The bottom 4 sided base and then the top which could have a piece of wood trim put on the bottom so that it keeps it all in place. [like an upside down picture frame.]