In a good report you should get Data Summary (presented in as simple of terms as possible), Management Recommendations (enhance water quality [liming, fertilizing, turbidity control], vegetation removal or addition, stocking, fish harvest guidelines, feeding, etc.), including how to do it all, and a Timeline for work to be done. We inventory vegetation, sample water chemistry looking at 10 or so parameters, dip all fish coming up, weigh & measure each bream over 6", count all forage and weigh a sub-sample, weigh and measure all bass and catfish, length frequency of bass, bluegill and redear, and perform length to weight analysis on bluegill, redear, channel catfish and bass. You can't just look at fish; the ecosystem (fish, water, habitat, lake surroundings, etc.) is what should be evaluated. Never pay full amount up front, they should ask for a deposit (25-33%) when they arrive to electrofish, but the bulk should be paid upon receiving your report. Generally two reports should be provided - one for the property owner and one for Land Manager. In this case it sounds like you are both. Reports we do take about three weeks, not because they take that long, just because of the numbers of reports we have to do at one time. Getting reports out as fast as possible is important, because landowners and/or managers want them yesterday. The more data collected the longer it should take. The other thing to look out for is a company over-recommending their products. There are many companies out there that really don't do a good job evaluating and charge less for it than the more thorough companies; because they sell things they hope you will buy from them, one of the biggest products being fish. Sounds like you already have a good knowledge of aquatic ecosystems and fish management, so you should do just fine! Good luck, and enjoy the lake!
