1st I wasn't insulting you...peace...OK; You are basically following the same path I went down...LOL

Without seeing your setup...It is hard to give you a perfect answer, but I will try. You can always start your seeds in 1x1's and put into netpots filled with hydroton in the tub and run drippers...In an 18 gallon sterlite you could put 2, but if one turns female you would have to just snip it off at the bottom...Great start.

Here is the other problem when trying to have more than one seedling per unit...From seed you have to veg minimum of 4 weeks, (now this is after rooting and all), minimum 4 weeks, but you should veg seedlings 8 weeks...follow me?
By the time your seedlings are ready to flower, They are big!!! So therein lies the other problem...A fully vegged hydro plant spreads out way more than the area of the top of that tub.

So you really need to concentrate on a small mom and a small cloning program.

finally. If you want to try...plant a couple and when they root, place them in your unit. That is the best way to learn! When I started and even now...I talk myself into doing things that I know not to do from a trusted and experienced source, but I felt I couldn't truly experience the problems unless I created them for myself. Goodluck
I would still like to know how you are going to top feed with just one tub???