Augie and 4CP, I decided to diy a ramp at my pond with a 16 foot Jon boat. I’m happy with this decision. The only thing I have to do is get the battery in/out of the boat to charge for the trolling motor. The one thing I would change is using a treated 6x6 instead of a 4x4 where the winch mounts on the upright post. It’s an easy build with treated 2x4’s, 6x6, a bag of quikcrete, 4 inch x 20 foot pvc pipe halved lengthwise, 4 inch x 10 foot (2 5 foot guides driven in the pond bottom, deck screws and a hand winch. Here are a few pics.

https://imgur.com/a/zVFp7x3