Re: lots of questions depending on the dimensions of the "200 gallon" tank you could get by without 250 or 400 watt Metal Halides. that is a serious amount of light, especially considering you wont be filtering it through water for the most part. T5 lighting with good reflectors should be plenty for the vast majority of plants you'd prob use. low light plants in the water (anubias, crypts, sags ect.) and low to high on the land part. this could still run you close to $1000 depending on lenght and depth of tank.
lighting aside, what exactly do you plan on putting in the tank animal wise? this will have a big impact on the nessasary filtration, heating, substrate, and not to mention final cost. do you want $5 anoles, $50 tree frogs, $100 day geckos, $300 chameleons? flashy orchids and broms will cost way more than ferns and pothos vines.
just some stuff to think about.
-nick |