Consider it takes 50-70 days for most strains to flower/finish
If you don't have both a Veg space, flowering space the time will be greatly increased between harvests.
Say its going to take 120 days to veg/and flower out the 1st time around.
Before you out your plants in flower, you should make cutting, and root them, veg them, and have them ready for the next go around. That's way these is 50-70 days between harvests vs 120.
1/2 oz a week for 60 days is 1/4lb. Easily obtainable.
I would get a High Yielding Strain like a Mr Nice Critical Mass, Critical Kush, Super Silver Haze... Some phenos of SSH go 84 days, but other phenos can be found 60-70 days.
Elemental Seeds Mango Tango
Elemental Seeds Grizzly Kush
Reserva Privada Kosher Kush
If you use a 1000 Watt Hortilux Super Bulb, 1-2 20 Gallon Container and 1 of the above strains grown Tree Style, if you cant get 1lb+ your doing something wrong. I always get at least 1 1/4 from the above strains per light... Often 2 lbs per 1000 Watt Hortilux, but as a Minimum, if you cant get an LB somethings wrong.
I also veg in a 5 Gallon Container x Promix BX, Sun Bulb Better Grow Orchid Fert. Both Veg/Bloom formulas, and 1000 Hortilux Super Bulb.