If i can feed you even more bull$hit... if i were you go straight to RDWC. Even if you just do a single pot, with the ability to add more later add a reservoir.
Heres why... its actually way easier. adding nutrients to the reservoir works much easier than straight to a pot. Taking measurements is much easier with a res. You can use a all in one constant read meter. You can add an autofill valve straight off a reverse osmosis if you like. This is my single favorite addition i have. Once your Ph is set you can walk away for a week or more with auto fill. You can stock more nutrients with a res, which helps nullify the the dilution of the fresh water from the autofill. If you build it to expand, all of your Ph and nutrients are will be alike for all your pots. There are so many benefits to a reservoir, and not much harder to do than just a pot, but im a little high, so im gonna keep the rest a secret. Haha Seriously lets talk. I would be happy to help if i can