I've ran coco a few times but certainly wouldn't say I'm an expert.
Right now I've got an experimental tomato outside in coco and it's kicking butt in a 5 gallon cloth pot.
The number of times you have to water depends on what you mix with your coco as well as the pot/plant ratio.
I ignored the advice of several other growers and ran a plant in straight coco -- and it did fine.
Gotta use more cal-mag and less K, but other than that, it's not much different than promix.
But again, I'm no expert...