As Esshup points out, the best results are most likely starting over. The pipe that you have a pic of in the beginning, it has plants in it. Did you ever find out if the pipe has problems like holes, rust, etc.? Or is the plant growing outside of the pipe and just hanging into the middle? I bring this up, because if you drain it you might have more things on the "to do list" than just restock. To fix pipes, dig spots deeper, etc can add up fast. Just be aware of what you might be getting into.
Another temporary option might be to stock something fun, or something to learn from. For example, you could throw 30 RBT in there in the fall. Let them knock back some of the small fish, and have a blast catching them in the spring. That option probably costs around 150.00 and lets you have some fun till you have more saved up.
