storage spaces direct on top of a storage space direct hyper-v hyper-converged recommendations.

I'm looking to implement storage spaces direct to make some of our services highly available.

I'm curious about a few things.

1.) if we do storage spaces direct on the physical hardware then create vm's ontop of the storage pools and then enable storage spaces direct inside the vm's across the 4 volumes what type of performance decreases could one expect? 

2.) is this a viable option?

3.) are their any know iis issues with saving data on top of csvfs and storage spaces direct?

4.) same question but for sql.

5.) what would be recommended practices to accomplish something along these lines?

hardware x 4:

dual e5-2690v4 14 cores 2.6ghz

512gb ddr4

2 1.6 nvme

5 10 tb hdd

2 400 gb os drives

2 dual port 50gbe mellanox connect-x3 ethernet cards

thanks.