Hand watering applacations give excelent results, but depending on if you want to develop a hydro type root system, you will need to water every day. The nice thing is you can get away with smaller pots, meaning you can pull 3 to 4 ounces off of a 2 gallon pot which would be more difficult in soil.
Coco spacific nutes are probably the way to go if you want to start your whole garden on coco. Canna coco nutes seem to be the most stable and give excelent results. Advanced has a line, but I have hurd allot of bad problems with their line.
Coco really needs a good zink and mag supplament so CalMag is a def safe gard in my opinion to avoid any defs. Lastly, a good brand of coco is paramount because companies harvest and process their coco differently. There is low grade which contains alot of salt from the ocean and then there is inland coco that has been flushed. I use GH coco it is middle of the road, I would use canna, but my local store does not carry it. Batanicare, bad spelling has a good grade as well.
Hope this helps some.
Adieu