How many plants for five patients??????

Guten Tag, City! I am a new patient in the michigan medical marijuana program. I use cannabis to treat severe pain from a very rare neuromuscular disorder.
A family member has agreed to be my caregiver and also intends to supply four other patients (so that this person can provide medicine to me at little to no cost).
How many plants at four weeks of veg would supply around two ounces a month per patient? Would it be worth it to let the plants veg a little longer and grow less plants?
I plan on starting out with a 4 by 10 tent made of panda film and lumber(4x4s for the corner supports, 2x2s or 2x4s for the horizontal support) with a 1000w MH/HPS. Found two eight inch duct fans on Ebay for around $55, each rated at 300cfm. Would this be sufficient enough to create negative pressure inside the tent?
Also, has anyone ordered from Nirvana Seeds? The prices seem reasonable and there are a lot of positive customer testimonials, but for all we know it could be Nirvana giving themselves a pat on the back. They sell Soiltabs and Flowertabs, they are supposed to be placed in the soil and the nutes are released throughout their respective cycles. Anyone ever tried these? They are cheap, but i would rather buy more expensive nutes than kill my plants.

Any information is greatly appreciated. Thanks

 

Anyone there???????????

 

thanks