Here is the problem you face: Growing trout in aquaponics is a great thing but you still need to buy your trout fingerlings every year.
It is a financial constraint but also it makes you dependent on the will and capacity of a local hatchery.
Which means, You might face years where you will not be able to find fish fingrelings and therefore not able to grow the best freshwater eating fish in your aquaponics system.
"That's a shame because an aquaponics ecosystem can produce a lot of fish fingerlings! You just need to learn the critical information specific to trout breeding. And guess what, You will be able to produce thousands of trout fingerlings!
In just few weeks you will be able to restock your pond and offer thousands of fingerlings around!"