How in the world do you get your local natural resources dept to sign off on this? If you have world class fishing in a stream adjacent to the lakes and you will be blending lake water and stream water (or I presume using the stream water to refill the lakes when the water table drops or evaporation kicks in?) freely?
Our DNR would have a conniption that water laced with boat exhaust, oil, human trash, and waste from the man made lakes would enter the fragile ecosystem of the natural stream nearby. Then they would put up enough barriers to make any developer choose to go elsewhere. Shoot, if they couldn't find an existing law that prohibits the project, they would either find an endangered previously undiscovered mosquito on the property or would find some 'sawgrass' on the edge of the existing creek and dub it a wetland in order to protect it from any development.
I'm glad our DNR has an eye out for protecting our water ways and our Great Lakes resources, but they do carry it a bit too far at times too.
How in the world do you get permitting to turn what sounds like a very valuable resource in the 180 acres around that stream into what they would probably view as a very profit oriented, 'glamping' destination for the upper crust? Don't get me wrong, for the folks who can afford it, it sounds like a great opportunity for recreation. I don't fault folks who like those activities and are willing to pay for them.
You have to remember that most of us in West Michigan are first or second generation Dutch immigrants and we usually make copper wire by pinching our pennies... Just the thought of doing a water based recreation with the cost meter running and the tab going up on the 15 minute interval would be an awful killjoy for me.
But again, we are spoiled in our State with almost an unlimited amount of water sport opportunities all around us in all 4 seasons.
I can see that you have a lot of experience in this area and I by no means would want to slow you down by showing my amazement that you can even pull this off