That sounds like a wonderful place to live!! If all the five ponds are from 15-25 acres, they are lakes!!
What I was trying to say previously is that these lakes will require intense management efforts whether you do it professionally or non-professionally.
It will be a lot of time and a good bit of money to have real impacts on these lakes.
In no way do I mean that it can't be done, or shouldn't be done, just that it's a massive effort.
If resources are limited, a thought is to maybe focus on one body of water.