5 is a tough number to try and run true perpetual.
I think I'd try and go big with that count. One plant per light in flower
Keep mother and veg #1 under a 4' multi bulb T-5
veg #2 under a 400 or 600, probably 10-15 gallon pot size min. Grow 'em multi-topped, short broad canopy
2 in flower under 600's or 1k's
Nice big plant like that should net you 8 zips minimum.
If you get a 8-9 week strain, that would let you pull every 4-4.5 weeks
Go OG style, figure 10 weeks. So you'd pull every 5 weeks
Either way gives ya about 2 zips a week;)
I wouldn't worry about room for "cloning". I'd just 'air layer' a branch of the mother.
Then when you're ready to harvest/rotate plants you'd have a clone already rooted and ready.
I'm no lawyer but, I'd think the 'air layered' plant wouldn't count as a 'plant' because it's still attached and
supported by the mother