i preferred totes just for the extra volume of water which means more stable pH. and less res changes.
are you happy with the 6 individual buckets?
if i were you, i'd think about getting 3 27 gal totes (2 plants per tote) and assuming 3 would fit in your tent. and then 1 27 gal tote as a control res outside the tent and switching your setup to RDWC by connecting everything.