If you start out with a good base of fathead minnows, and feed a good high protein feed, then i dont think you will have a problem with trout in a small pond. Just try to make it as big as you can.
I personally own a 1/2 acre rainbow trout pond with about 200 trout. I have had great success, and my trout thrive. However, i have alot of fathead minnows, and a small amount of crayfish. I feed also, and my fish seem nice and healthy.

If you have any questions or you just feel like updating us on your progress please post, im sure cecil, ,me, or someone wil be able to help you.

Cecil,
Nice pics!!

- Jighead