Got quoted $550 with shipping for one lamp
That is for board and driver.
You can probably do better, these are my buying advice: check locally for cut alu sheet and see if you can get a decent deal on 1000mm x 350mm sheets (40" x 14"), 3mm thick. These will manage atleast 250w per board easily, i havent tried 300 but pretty sure it should work as at 200w the boards need no heatsink and 250 w alu backing is barely warm. Also youll have some place to put monos or strips at a later time. Where im around this cost about 15$
By boards only, whatever fotops you like, my preference is v1 in 90cri, 2700k for flower only 3000k is more allaround but defo flower leaning. But these boards will probably come with a 10 unit minimum. If you dont wanna buy that many go for 3000k 80cri. Best for shipping is buying in multiples of 6.
Get drivers locally: hlg240-48AB or if you want a cheaper version with more power (but less efficient) try the lrs-350-48. But i would advice againt having the lrs insiide your tent. Drivers from china is a risk and hassle for warranty and you wont save very much. Get itt locally from an authorized dealer:. Having proper warranty and QC is worth it.
2 boards on 240 drivers will be enough per tent. These boards arent great on high wattage, as it increase hanging height and generate a hotspot.
3 boards per 4x4 is great but unmanageable in a tent.
Hanging height: about 14x16" but start out much higher.
6 x v1 boards plus shipping: around 600 plus trump tax.
Alu: lets say 100?
Drivers: depends on how you go but lets say around 300 for 6 x 240 drivers.
Comes out around 900 for 3 tents. Probably some more costs for cables and wagos bur sure as hell it wont change thhings much.
www.alibaba.com
