I use 2 tents that are the same size...4x2x5...one for flower with a 400w CMH...and one for veg with a 400w MH. Ummm...I started with one strain and I would clone that plant and flower the mom and keep the clone, and that worked for a few years, but then I wanted to try some other strains...now I have other strains, but am growing out of room in the veg tent...I also have a lot of other plants in there that are making things hard...anyway...I want to start keeping the original plants as donor plants and just take a few clones off of each plant and as soon as those clones have roots switch them to flower...I figure I can flower 3 large plants, or 6 small, or maybe even 9 super small? Who knows...but we are going to find out...I will get to start my run of clones very very soon...I am excited...I am also going to try something new for me...I am going to try out Coco with my tiny flowering clones idea...I feel like this will be more perpetual especially if I move a plant over every week...so every monday I move a plant...and as I reach the point of running out of flower room one plant should be done...and so it will be removed and harvested and then the next week take one out, put one in...I don't know if this would work...but I am going to try it...it is going to be slowgoing at first though...that is what autos are for though...
Anyway here is my thought process and experience on growing perpetually with tents...