And then you'll be swamped with people wanting you to bring in dozens of rare expensive species, insisting they'll happily pay $100 each. Then after you've spend tens of thousands setting up the facility and brought in thousands of dollars of livestock, spent weeks quarantining them...You'll sell two fish for $50 each and everyone else will say variations of, "Oh, Uhh, I had some big bills come up recently, I don't have the cash now. Maybe next time?"