Starting a reef tank does this sound good?

Right now, I have a 29 gallon Bio Cube with a Turbo snail, sand sifter snail, Coral Banded Shrmp (he and the eel get along so weird! he eats the eel scraps and the eel didn't even attack him when he pinched him!), and purple reef lobster with a 1.5 in bed of live sand and 18lbs of liverock. I want to add a green death (Green brittle star) or a black brittle star in awhiile. Now answer realistically people. Can a Snowflake live his life (or maybe until next February) in a 30 gallon tank all alone if he has lots of hidins? I plan to ad alot mor liverock and thick pv, a built in refugium(in chamber 2) and a skimmer. I think he can as I have seen videos of one on youtube who are 29 in long and live in bio cubes fine looking healthy and happy. I also want a ocellaris clownfish or two to live alone in a 14 gallon nanocube biocube that is a reef tank. Does this sound like an okay idea? I want some honest feedback none of that "oh! Snowflake eels can only live in 100 gallon tanks! or they will die and be ubhealthy!" bs because I have personally seen a two year old eel in a 55 gallon with other fish who was perfectly fine. Please be honest guys and how about the nanocubes? are they pretty good?