You don't need to order more starter once you have your yogurt. You can use a spoonful of your last batch to start the next batch. I go 30 minutes at 180-190*f with the milk, then i let it cool to 110*f, then I add my scoop of yogurt, then I will hold that at 110*f in a separate container in a 110* waterbath (just a big pot of 110* water holding my yogurt tupperware containers that I periodically splash more hot water into) for like 8-12 hours or so (I sometimes forget about it on the stove...). Then I put it in the fridge for two days and after its good to go. If you want it to be more like greek yogurt you can strain it with coffee filter paper and use the whey liquid for various things.