The only problem with doing a commercial Tilapi farm here Steve is that you have to get the fish ready in 3 months to be able to compete..Then its like having a piggery..The people that make the money are the feed producers and as I mentioned in my post above..The product is rubbish.
Small scale fishery for family and friends produce is a good idea though..Also Japanese Koi breeding.. Lots of Koi ponds in the R.P!