Seed/Seedling/Transplant Questions

Can you help me out by checking my process here form first grow (I'm growing 12 pure sativas (6 after picking males/unhealthy females) using the super soil method in 12/12 only [besides seedling phase]:

-after seeds are germinated, put into dixie cups filled with Roots Organics Original potting soil (I'm guessing this soil won't be too strong for seedling)
-once roots start to come out of the dixie cup drain holes (~2-4 weeks), transplant to 1 gallon pots, after they sex switch them to 10 gal buckets where plant will stay for the rest of the grow

question:Is transplanting twice okay or should I just skip the 1 gallon and go straight to 10 gal? only reason Im putting them in a 1 gallon is to save on soil since I'll be removing half my plants after removing males/unhealthy females (12 -> 6)

2 transplants is fine imo. also if you have time take a clone and let it get roots then sex that. unless your just going to leave them to flower after sexing and not veg them a little bigger. Happy Growing

Okay. I won't be vegging at all (12/12 only because these are pure landrace sativas, they'll get way too big if I veg). I guess I should take a few clone cuttings as soon as sex is shown.