Comments about Malber Casters for Fully Portable Use - WFA-1:

The casters are those in the "portable kit" for the Malber frontloading washing machine. They are not very good but they seem to be the only game in town. They might work if you only wheeled the washer in a straight line out and back but if you have to maneuver over to a sink good luck!
But I haven't found an option so for that reason if you wish to feign portability, go for it.