Electric Wiring for Multiple Miners from 220V

[alp]

I have a single outlet at 220V on a 40A breaker.  I want to run about 7500W of miners off of this outlet.  Some thoughts on how I could do this:

Disassemble the outlet and split the wire into multiple outlet boxes in parallel and use the new outlets.

Find an appropriate PDU for the miners.  (Having trouble finding one with the appropriate input and enough current ratings).

Any other options I am missing?

[big al]

Consider Y cables.  3 outlets 3 cables feeding 5 or 6 units.

[big al]

Use a dual 6-20p outlet:

https://www.amazon.com/Leviton-5842-I-Receptacle-Commercial-Grounding/dp/B000U3BVMI

Attached to two 6-20p to c13 y splitter cables like this:

https://www.rackmountpdu.com/category/189-6-20p-to-c13-splitter-power-cords.aspx

That will do 4 units for less than the cost of a PDU alone.

[alp]

Use a dual 6-20p outlet:

https://www.amazon.com/Leviton-5842-I-Receptacle-Commercial-Grounding/dp/B000U3BVMI

Attached to two 6-20p to c13 y splitter cables like this:

https://www.rackmountpdu.com/category/189-6-20p-to-c13-splitter-power-cords.aspx

That will do 4 units for less than the cost of a PDU alone.

Current plan will be the following:

Get a 40A dryer cable and run that to a 3 gang box.  Get 3 of these receptacles and build my own box from those, then get cables from the receptacles to the miners.