I mean, I know some folks swear by 60 day runs going 12/12 from clone, and I also know that some strains respond differently to different growing techniques, so without knowing everything that you plan to do, and everything that you don't plan that just happens, it's going to be difficult to get any kind of accurate ETA but ballpark 8 weeks is usually a decent bet. now that 8 weeks is usually measured by looking at how long it takes a mature plant to flower, so it could be more like 9 or 10 weeks going straight from rooted clone.
As for yields, sure a zip per plant is DOABLE. if you're good at growing and you've got your medium/nutritional profile dialed in, environmental controls are ideal, and nothing unplanned-for happens during the grow. I'd put 'em in 2 gal pots minimum if you're going for an ounce a plant. Also, you're walking a fine line here--600w HID for 9 plants isn't quite enough in my opinion--you've got a bunch of plants, not sure how big a space, a time deadline, limited light, and a yield goal, not to even speak of the kind of environmental control you've set up and whether it can handle the ambient weather in your area for the whole 8-12week flowering period.
Depending on how long you plan to be away from them on holiday, i'd opt for a full veg, perhaps some topping, and then planning on finishing after you get back. You can rig up a simple autowatering system for while you're gone that will get the job done for a week or so. If you're planning on being gone longer than that, I don't know what to tell you. but, it's likely, if you're going to be away for more than a week-10 days, that you'll need a trusted friend to check on them while they're drying to see if they need to get jarred up. I don't like trusting someone else to gauge such things that are so heavily influenced by personal taste.
Again, long story, short: plan on this taking longer than you'd hope.
be easy,
Dr.J
