If I added all the costs ........... which was
around 15,000bht (2x HLG240 with Quantum LEDs, Mars Hydro Tent, carbon filter, fans, pots, peat, cloner, seeds, nutrients, electricity)
and produced 560gms in a 6 month grow that would up the price to 25bht/gm.
From 25bht/gm (inc everything) to 700bht/gm is a lot of profit.
I'm using the same equipment again this season, nothing broke.
Still enough nutrients left for this year.
All I've bought for this year is some peat 520bht, light timer 150bht, 24 seeds from the UK 4,000bht.
So this years grow (assuming 500gm) will cost me 10bht/gm.