If you don't do fish....I've heard dog breeding is quite profitable, especially the champion hunting labs or whatever you wanna call them. $1000+ a pop.
If you do use a canister filter (I dont recommend it because of maintenance issues) use Lilly Pipes. ADA Lily Pipes This makes it quite easy to get water from your tank to the filter and back. I would recommend personally a sump, good skimmer, and fuge. With regular water changes.
Also, NO...