My kitchen island is a 66" x 36" countertop supported by two 33" x 24" base cabinets, leaving a 12" overhang on the long side.
The island weighs at least 300lbs empty. Contents will add another 150-200 pounds, for a total of 500-600 lbs.
The flooring is loose lay vinyl.
I'm working on making the island mobile by creating two caster bases made out of 3/4" or 1" plywood with 4 casters attached to each one, and then to place them under each cabinet base. This is honestly the cleanest look I can think of so that the majority of the casters are hidden, and so that the island does not sit too high.
I am finding 4" casters to be the most common size online, and find some that seem to be a rubber or plastic that is non marring. I believe these are the way to go for the vinyl flooring, but I am not sure if I will run into a problem with the vinyl wanting to "catch" when trying to move the island? Secondly, I am not sure if the island will want to move too easily? I can not imagine 500 to 600 pounds, with 8 casters, moving without being intentional.
Anyone have some experience with this or have something more to add? I'm trying to keep this simple, and not so complicated that it never gets done! I also am not sure how else to get casters under the island without them being an eye sore.