I'm both impressed, and freaked out. This is a great thread, very informative. I have a tent, lights, fans, and whatever else for hydro, but think I would start with soil because it's more familiar, but then nothing is familiar about indoor growing, so maybe best to get right to hydro...
Growing in the colder part of the year, seems a wise idea. I don't know that growing indoor in Summer would make sense, as I can more easily grow outdoors in Summer.
Food for thought, for sure. As it's almost Spring, it's too late this year, I think, unless I want to get seeds or clones going for outdoors.
Growing in coco coir will give you the same explosive growth as hydro, not sure if it's easier maintenance as hydro can get pretty simple if you have a lot of hardware. For my small garden of only 6 plants I was hand watering them without too much fuss, just have to have a bit of runoff to keep from having nutrient salts building up. I have this plastic shelf unit I sawed down to make a slotted table to hold the pots. Then had some long shallow plastic tubs below to catch the runoff. Used about 8" of floor height so the tent still had plenty of vertical space to spread out the canopy and be ready for bloom.
It's definitely a great way to get your outdoor plants a head start, they'll probably end up being huge if you start them in February and dont harvest until October!