Yeah 3 inch pots are fine as you just need that to hold the base as once the roots fill in the weight holds them down tight .I posted the 30 minute build for these last month but I do sell them prebuilt ready to go. I sell them for $75 plus actual shipping. I include the 6 site tub, 6 netpots, the mister manifold, installed misters,the need hose attachement, a 200 gph pump,some cloning powder to get you going once you got a girl mommy, hydroton for the net pots,6 rockwool cubes and a basic setup instruction sheet to get you going.I dont add any handling fees as the price I sell them for covers the build cost, my time and packaging.Just charge the cost of the ship weight.I can add the 3 bottles of Fox Farm grow nutes for $45 with a feeding chart if needed and I can also get 150 watt cfls if thats the light you want those run about $50 for 2 bulbs your choice red or blue or 1 of each.