I dont have a setup yet

I'm still in the planning/dreaming stage lol
I was thinking bluefin carp because then I dont have to worry about temps (because they are native around here and handle the temps well). I was going to set it up in a green house, with 2 linked larger tanks and1 smaller low one with a lower drain to naturally filter out the fry into the small tank, which would be the grow out tank. The small tank would then go into clay media beds (i was thinking tomatoes and peppers) which would either go underground and out to a small run-off duckweed pond (which would then be pumped underground in some pipes and back in) or just underground and around in some pipes, before being pumped back in to the next grow section. Before this everything is gravity run. Next is strawberry pipes, leading to an elevated floating bed of greens above the biggest tank, which then drains down into the largest tank completing the cycle. The underground pipes are to provide some temperature stabilization. Where we live It only takes 4 ft to reach a place that stays roughly 20° warmer in the winter and cooler in the summer, naturally at times it would take alot of pipe for the water to completely reach that temp but since it will be within a greenhouse and the fish are not sensitive to temperature changes i think that should be plenty. I imagine the warmest the pumped up water would get is about 70, and the coolest about 40, which is within the Carp comfort zone. I havnt done the exact math yet though, only rounded/estimations. I would prefer the duckweed pond overflow option, I think it would simplify alot of potential problems, but i have to get permission to dig out a small pond on our rented land for that lol.