I could pull 60 colas perpetually with the following equipment (I get deals on some prices so might be a couple hundred more for you)
$50 - 4x8 Tray
$75 - 6' Light rail / Mover
$50 - 8" cool tube
$100 - 1kw hps/mh switchable with fixture / cable
$80 - EYE super hps 1000w bulb
$30 - 60 1 gallon pots
$60 - fox farm veg/bloom nutes
$30 - hydrofarm heated propagation tray, with insert and dome
$8 - phase 2 tray, insert, 10" dome with slidable air vents
$12 - bottle of clonex gel
$24 - bag of 100 rapid rooters
$75 - co2 regulator
$160 - co2 bottle & fills for the duration of 1 flowering cycle
$100 - 8" filter
$200 - various fans
$300 - miscellaneous parts, tape, bungee cords, timers, ducting, etc
$300 - meters
$300 - portable ac for more heat management.
$100 - medium for mothers and flowering plants
$300 - veg/mother/clone tent
plus the cost of genetics.. and remember I get special deals on some equipment. (mostly ballasts cool tubes fans filters, all the expensive shit)
that's almost everything if I remember... I get black/white poly for $1.0 per 10x1 feet...
that's around $2500 but that's a pretty slim budget, there are a lot of other things you can get to make life easier on you and the plants, but that's a good enough setup for good SOG production.