One post here works for me 
I’m more busy today, but yeah, I think moving the walls so you could get more plants in your flower room would be good. Especially if you want to be able to run anything with a really long flower time, I think you’ll find it small otherwise.
Though that depends on how much space you are thinking you’ll need in your veg room in addition to baby plants - will you be keeping a bunch of mothers, for example.
With the soil tubs and filtered water, I suggest going all the way to SIPS.
There’s a great thread here - CrunchBerries’Probiotic SIP Thread