Quantum boards can hit 1G per watt easily, once tou have your grow dialed in. Expert growers can push 2G per watt. But honestly dont focus on yield. This is the current best (well one gen old) light for your money. It will require a little DIY of connecting some wires into holes but does not require heatsinks. These diodes will last you a very long time.
If you really want to learn, you gotta read and educate yourself. Here is the official HLG thread. They designed a very popular pcb layout for Samsung diodes that they branded Quantum Boards. There are also other threads ie search Chinese knockoffs quantum boards if you want to save a few bucks by buying direct from China.
Here is the link to the last page, you can see from recent posts what kind of yields people get.
I'm going to run it at 460 watts on a pair of HLG240H-C2100 as they are already in place running my COB light. All I'll have to do is take down the cob light and mount this one, hook up 4 wires and done!
www.rollitup.org
As another idea, you coukd grab 2 packs of these QB120s, and a 2nd driver (or just get one 480w driver to save a few $) so that you could cover a 4x4 area. I would still recommend the tent for an extra barrier against pests but you could skip that.