Jeff is right about the limited carrying capacity of ponds and the restrictions on one your size. He's also right on about doing certain things that can increase the capacity, but I am not sure how much of an increase you can reasonably expect to obtain.
By all means you can have a 1/4 acre bass pond just realize not going to have lots of big bass as jeff mentioend.
And that my friends brings my good post count to 37, and that ain't bad.
TJ are you paying attention here?
You need to add this to your "JHAP's Words of Wisdom" file.