(That is a 4 foot wide room. You would be close but not close enough I am afraid in that tent. 6 buckets should fit no problem.)
Not that much. Buckets are 2 bucks per, the res was 8 bucks. The costs are in the water and air pumps. I have those linked in 2 series and the circulation is just top feed and gravity back to the res. I run a 250ish GPH pump to the feeders and I have a 60 GPH pump in the res. that just recirculates back into the res. solution. I plan on adding another 60 pump to the res. and run one to each of the far buckets to increase the recirculation.
Each bucket has 1 air stone and the res. has 2 stones.
Here is my Flower room. Same concept, larger res. with added fresh water tank on top to top off as the plants drink. This is set up in parallel but I think I am going to switch that next round.
And what the heck, here is what it looks like now.