This is, to put it politely, a complete travesty of what I have been suggesting.
You have suggested spending extra money on SATA SSDs and moaned about having to use a valuable SATA port for a boot drive.
I have suggested a completely different way of using your existing hardware which will be more effective and perform extremely well. And I have suggested that you spend the same extra money you were planning to spend on SATA SSDs on a 3rd 16TB drive.
But you have completely mis-interpreted what I have said.
On this basis, this is my very last post in this thread. You are now on your own. Good luck.