Hmm....does the space have to be filled with just 1 tank? Because if you can fit a 75 gallon in the space, you could also do something like both types of 35 gallon tanks. That way you can have different types of community tanks instead of choosing just one idea.
I'm also more basied towards Native tanks than bare tanks. I'm going to start a naturally planted 20 gallon long tank in the future that is going to be all drift wood, live plants, and hidy holes. So I vote for a native tank. XD
Oh, I would take betta breeding off the list unless you know your pet store wants you to supply them with betta fish. If you have no buyers you'll be up to your neck in fry with no future homes. DX
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