I took a boat to the fabricator. Told him what I wanted to do and he asked me some questions. Custom designed steps that were built to suit me. I wanted front mounted to the winch stand and frame of trailer for sturdiness. I wanted to have them placed in a manner that would allow me leave the boat down 3 steps with a handhold plus be able to hook boat up with out getting wet. The last step was almost level with the trailer allowing me a platform to stand on and have ample room to hook up.
This was on a previous boat and can't remember the price but it was considerable less than the steps I saw on line.