Instead of cabinets, have you considered shipping cases? They would hold the same stuff as cabinets but could also be moved around to make room for freight when it bacame necessary to do so. We're doing that in our truck. The cases are small enough to lift safely even when full. They can be stacked on top of each other if necessary and easily secured to the E-track. They are waterproof so they stay nice and clean inside. The ones we bought come with a lifetime warranty.
They come with optional cut-away foam linings like you see in some gun or camera cases. That enables you to create any size foam-padded space you wish to protect your fragile personal gear. The cases come in a variety of shapes and sizes. One version even has wheels and a retractable handle on it like you see on suitcases in airports. Only it is very heavy duty. You can jump on these things and drop them from your truck and they keep on ticking!
In a van, perhaps a system of ropes and pullies could devised to pull and lock the cases high in the van when necessary, something like what some van drivers do with their beds.
The manufacturer is Pelican. We learned of them at the Mid America Trucking Show in Louisville, KY. They will be exhibiting there this year too (March 31-April 2).
If you do a Google search on "Pelican Cases", you can find product details and a number of dealers that sell them.
