I'd go with perpetual bro if it's just for yourself start 2 at a time in 4 wk intervals so once you start cropping you got something comes down roughly ev 4 wk (in theory lol) as for strains it comes down to lighting really with autos if you've got decent led I wouldn't worry to much about having a completely level canopy as you will be best working on DLI as opposed to ppfd and with enough led you will be able to keep ya lights high up enough to cover the height most autos reach, its nice to have a choice of jars at the end of the day