For that size pond, you'd be money ahead by draining the water down, digging it out to as dry a condition as possible (more efficient in moving dirt dry vs. wet), and then get busy with moving dirt and placing habitat in the pond for the fish before it fills up.
The $$ spent on stocking new fish would be the least of the money expenditures of the whole project.
If done correctly, and stocked correctly, fish can grow much faster than you think. We have had Largemouth bass stocked as fingerlings in early May reach 12"-13" by late September. If the goal is to grow large panfish, that can be done relatively quickly too.
| 
