Its going to take a large BOW, time, and most importantly, money. The hard parts will be sourcing the fish, and predicting any sort of balance you may or may not achieve. The pond or lake will need to support a wide variety of habitats that are partially isolated from each other for all off those species to thrive, otherwise one will dominate over the others without a lot of management on your part... at least that is what I understand as I am not a biologist, just an learner and observer.