Ponds are nice. Lot's of stuff on you tube. To me it's sort of like installing a pool. Same components except the ponds are usually just plastic lined. Still have large scale filtration and heating. You could also do a pond with a viewing panel which I think would be awesome.Right now im keeping a 750liter tank, a 1,2m hillstream tank and a shrimp tank.
Thanks for all the information
Maybe I will do something like Diy king did, doesnt seem so expensive to build such a pond in your house.