I don't mean to discourage but I have two little areas of hopefully helpful criticism-
#1 The name Mundungus is, I am pretty sure, copyrighted or trademarked or something by some major company affiliated with the Harry Potter series.
#2 When people read this, they may be uneducated about fish and a very mixed community tank like the suggested one could encourage people to keep fish in that way, even though it is fictional. Look what happened with Finding Nemo.
It's not a dumb question if you ask it.
Too many tanks? GASP! How could that be?