Did you mean four 6S/5000 per each unit? or to power all 6 units as I assume? Seem to me pretty inefficient gadget, which ever way. I run five 127mm fans in various EDF jets all on 12S but each on at least 8-10 000mAh. My units produce 10-12kg of thrust at pretty high current draws up to 250Amps on full bursts which I don't have to use much, having enough power taking off at 50% power output as seen in attached video flying last Sat. at pretty crappy field among cow pastures, enjoy and Happy and safe flying.
https://youtu.be/ZqeBk0dZNbU