I have purchased tons of this and similar units from Costco over the years. They started off at around $70 and now I think they’re up to almost $100 but I believe they are about identical to that one. So you might consider that. I even have a couple of extra units in storage. I’m in the process of cleaning out that storage unit and moving some things around so let me know if you were interested and I will get an inventory on what I have. They are very useful and are a pretty good deal and quite heavy duty. I believe that mine have wheels on them. That is wheels are an option or you can install feet on the bottom rather than the wheels.
With the Costco models at least you can also just install half of the unit as the vertical posts screw neatly together. That is you can have two separate sets of shells and I’ve done that many times for certain applications