Looking at a google search of Hazet tool box - All I see is carts. You would need 4-5 of those "boxes" to store what a triple bay box from lista, snap on, etc. And the layout would absolutely blow. Just buy a 6 drawer HF cart. Stahlwille looks the same, their "boxes" are carts. I could 100% fill one of these with my diag tools. Aren't Hazet/SW just german snap on?
A lista triple for $5k seems like a much better option than an army of single bay boxes, especially for what I'm seeing the "assistant" line of box/carts going for. You start to lose after that, because you need to get into lockers to maximize volume for things like timing tools, diag/scan tools, bulk thread/drilling, etc. So you need separate cabinets at that point.
IMO, as someone who owns a snap on box - just buy HF or similar and run it until failure if you are looking at the new market, not used. They hold zero resale so why bother, double them up when a sale coincides with a need for space. Footprint isn't ideal, layouts not great, build quality is okay. But they'll get the job done. No sense buying german brands if you aren't getting good layout or size. Unless I'm missing a very large section of the hazet catalog. The cheapest per $$$ ratio is probably a terracotta army of HF boxes.