The final plan, if my tests succeed is the following:
Have two different size Ikea Samla boxes. On the top of the shallower put an acrylic sheet (this one I've in my lab), and mount 6 (or 2x6) 120x120x38 24V Sunon Maglev fans. This ones together has higher airflow than the industrial blower.
Punch a hole onto the bottom for the cyclone. Mount the bottom of the cyclone to a samla top. Connect the bottom of the upper shallow samla box to the samla top at the bottom of the cyclone with some threaded rods. Put the deeper samla box below this samla top as the dust collector.
Build some speed control electronics for the fans and add a 24V industrial PSU for the whole build.
For the first trial, I don't want to buy anything. I'll just empty the necessary boxes, already collected some random 120mm fans (12V ones) and a PC PSU. If the build succeed, I can buy the Maglevs and the PSU.