If you’re not committed, you don’t actually need an appliance for it, have had great results with a Dutch oven and a programmable BBQ thermometer monitoring the water temp. One of my burners goes really low so just a matter of adjusting to keep in range. You don’t get forced circulation (get some natural circulation though) and it’s not set and forget, but you can do with stuff you probably already have on hand. Done with heavy freezer bags before I was gifted a vacuum sealer.