Homemade stationary bale bundler

Anyone ever build one or know of one? I already rebale small squares from round and was thinking of building a hydraulic bundler that I could squeeze the bundle and tie with poly strapping. I've found a market for all I can make but they want bundles. I only plan on doing around 5000 bales so it's not worth bale baron. Thanks

Homemade stationary bale bundler