If you want to do it from one plant, with 'short veg time', you're gonna have to weigh with stems and everything.
If you do some reading, you will see it IS possible, with the right lighting, right soil, right strain and some effort.
The RI laws on weight is just ridiculous even if u suck 2.5 from 1 plant is easy..Never mind with 12 or 24...Best bet is do do perpetual grow 1 in 1 out etc.
I suggest starting with clones rather then seeds. Unless excellent source of female seeds.
8 Plants in veg, 8 plants in flower. 1 mom plant, 2 spots left for clones learn then how to clone, move a plant to the next station once a week. Once a week you cut down a plant... kinda alot of work trimming and drying ect but you have your own meds weekly. Just fyi only way to stay below your limit is to pick up auto flowering plants and harvest only 4 or so at a time.
Working on it. I'm finishing up my flowering room by the end of the week. Hopefully throw some plants in there by next week. Once I have medicine I will be looking for more patients.