Make a simple Test if 1.) ssd is fast and 2.) how fast it is with sata.
Normaly you have a deliverspeed for ssd in real of+- 400 and sata goes round 150.
If you take 2 satas it goes uo, but..the divorce of the renderjob also will make a significant
I use simple Renderslave-unit with 2 ssd and second pipe is 4 satas ( from wehre i get textures, files, and also make
a secondary backup there, if job / paranoia is high..)
And eaven in same Renderengine it can cause diff. Workspeed-outputs.
In first simple overview. it is also, how moch Mony do you have, how stabel is it ( satas go like farming-traktors, ssd can
make a mice hobby = fine mix of stabel, normalfast and price are Samsung evo 850, ne newer BX300 are bigger but...
in a thirdrow-testpahse..) and 2tbt satas .. Do not see much troubls and works.
sys : normal i7 7700 gtx1070 and so on------------------------ renderslave : 2x ssd 2x sata okidoki..