One caveat is "Expensive" cabinets can be found on the used market. I am a big fan of buying inexpensive/used cabinets with 400lb capacity drawers. I suspect I will only load a maximum of 200lbs per drawer but, as someone else mentioned, they open & close with ease even when heavily loaded. My 3-drawer Kennedy-Bott CNC cabinet is full extension with 550lb capacity per drawer! I am always on the lookout for another great deal for a used Vidmar, Equipto, Lyonn, or Rousseau. I was very lucky with these three super good deals: Kennedy-Bott CNC cabinet $50, Equipto $450, and I think the Vidmar was $250.
The Pros far outweigh the Cons, nevertheless there are a few minor Cons to consider:
Con #1.: I waited years and I spent enormous time searching Craigslist! Oddly I found all three cabinets within 2 week timeframe.
Con #2: I had to get rid of other items to make space for these. Not easy for me with a small garage.
Con #3: Quality casters with proper load rating can be expensive. I bought a dozen casters, with 1,000 to 1,200lb load rating, for a ridiculously low price (also required time/patience to find the good deals on Amazon of all places).