Likely you will need two PSU's - 12 GPUs will need a lot of power. And then some.
You must be aware of what all is involved and required - including wattage calculations and cooling requirements.
For the most part there are options, trade-offs, and risks with the mining rig you have in mind.
Google "PSUs for mining rigs". Filter the results to the last year or so.
I found quite a number of links that should prove helpful.
For example (not a recommendation or endorsement):
https://www.windowscentral.com/best-power-supplies-mining
Granted not a direct answer to your post. However, you are planning a very expensive mining rig and the real ROI (Return on Investment) is likely to be very low.
No room for costly...