I think you would find them to be inadequate. The main difference between those and a rack system, is that a rack system has SHELVES. SO you can slide the tubs out and back, without disturbing the heat tape or the thermostat probe. The shelf above acts as the "cage top" so the snake can't escape. In this case, it looks like flimsy lids, you would have to strap shut and they wouldn't stack as neatly, with heat tape, probes and a belt strapped around them! Then you have the problem of how to secure the heating tape and thermostat probes? Where would you out them in a stackable system? You would have to move them all the time, and it would be tedious and you would eventually end up with broken heat tape.
I think you could MAKE it work, but it would be such a nightmare, that you would scrap it all and start over.
I build my own to save money. It requires a lot of effort and time, and it takes skill to build it RIGHT. So if you are not the mechanical type, I would recommend just buying a professionally made rack.
If you are up to the challenge of a rack build, here is my project that I am very pleased with. It works great.
The link below shows a brief series of photos of the build.
https://ball-pythons.net/forums/show...e-Breeder-Rack
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