I had a great papaya tree die of old age and in it's sunny spot I put a 5' tall Ruby Red guava. I've had bad luck with guava they always got inundated with scale and the fruits have had fruit fly.
This one is in a spot right near my back door so I can pay more attention to it and hopefully catch problems before they get out of hand. I have a good supply of mesh bags and horticultural oil to battle with.