30 plants is no longer a hobby garden, it's a farm and farmers work long and hard (that's what they have us believe anyway).
Like witchy says, monsters take work. Max yield is limited by space more than anything, that's why the seed companies quote g's per m.
A 1m square tent may yield a pound of bud, some try for this with 1 monster, some squeeze in 4 plants. Same yield.
So to grow and care for 30 monster autos you'd need a big room and a lot of time.
What was the question?
Itisi
it is isn't it?