Fabric pots will do fine but if you're planning to do LST then I would personally go with plastic pots with a lip on top. Gives you something to tie to with your garden wire. Fan speed controllers are good, but you may very well find that your fan will make a horrible screeching noise as the motor struggles to turn because of the decreased voltage passing through it. If you haven't got a ph meter, get one. You will need it, and think of it as an investment rather than an expense; don't buy a cheap one. If it's red or yellow and reasonably priced then move on. You can get by without but I've found an EC meter to be invaluable. If you have hard water you will never be able to accurately apply nutrients to your water. You mentioned you want maximum potency and yield, so I'm wondering why you're not just growing in straight coco/perlite? They're autos, and you're gonna LST them, they will grow faster in coco, more branches :)
Edit: welcome to the farm!