I've found that maintaining a lake can get very expensive. Paid $1600.00 last year to kill grass, not to mention the cost to build it. So I'm thinking about letting some people in on a fee per trip. How much fishing can a 25 acre lake stand? In both my smaller ponds the fishing has gotten really bad. I'm friends with a guy that does some guiding and the claims that they don't have much of a memory. I've seen that not to be true. Seem pertly smart to me.