Why you thinking marine, Biulu?
I am definitively interested but and these are big BUTs, I travel too much for my work (might be away for a month again soon) and I don't see myself administering mysis shrimp through an automatic feeder during that time...
I also have no space and have reached my tax on the number of tanks I can have. And my last consideration is an environmental one: if I cannot be sure these organisms are bred/multiplied or whatever you want to call it in captivity, I am out. I have lived too long in Mexico to know exactly what is happening in terms of illegal fishing in the Strait of Cortes, also called the World's Aquarium. Maybe I should take a diving course instead?
Many of the corals I have are actually fragged from other hobbyists, so if you wanted a tank that was exclusively aquacultured in captivity, it's very possible. You can even get aquacultured LR.
The most demanding thing, at least for me, with my SW picos is the maintenance. I'm not doing back-breaking work, but each tank requires a little time each day. I feed heavy, makes everybody very happy. No, these are not tanks that I can step out for a month and expect everything to be all dandy when I return. I can maybe leave for a week max and my non-photosynthetic corals will definitely be sulking when I return. Not dead, but sulking. I suspect my Caribbean biotope would do much better, perhaps 2-3 weeks, if I rig an automatic feeder. It'd be overgrown though. I'd have to prune it before I left to ensure that nothing goes sexual in my absence.
L