Free: Contests & Raffles.
About 15 years ago CoryTDF got a bunch of us together and built one. It's basically a small shed with the inside covered in thick foam insulation, an air conditioner and a Cool-Bot. We all chipped in $100 for the build. Best hundred bucks I've ever spent. I know I've hung over 30 animals in there for at least a week each. Biggest problem we had was when he sold the house and we all had to show up, jack the thing up on a trailer and move it to his new place. Having a "house" resting on high lift jacks when you have body-parts within squishing distance is a "significant emotional event"
I made a walk in cooler with cool bot at my shop. It's not cheap and quick to do it right. Here's a FB group that showcases peoples coolers. Worth a look. It's a private group I think so you may have to join to view.Davehttps://www.facebook.com/groups/470986964662640