Are you thinking of doing the trout (Tigers)for there full lives or grow them out in the pond once they are larger?
If I do tigers I may get the triploid eggs this fall and hatch them out in the basement. If I do that I will keep them inside and put them in a cage in the trout pond the following spring. Otherwise the larger trout in the pond may eat them or not allow them equal access to the feed.
I'd like to build a building to do this but probably won't have the funds for it until the fall of 2014 when I sell my 4 to 6 pound brook males. I should have at least a 100 of them and can get at least $50.00 each so that will be my fund for the building.
On the other hand I may just wait until I have the building.