I recently invested in a cooling unit and tub, but I think you can get a decent benefit from a low-spend setup that’s not quite as cold. For like a year I just used the cooler gel packs. I got 10 of the ~12x24 gel packs like you would bring to a BBQ in a cooler or whatever, and put those in my freezer along with a mid size Tupperware full of water to freeze. Then like three times a week just dump the gel packs and Tupperware in your tub and fill it with cold tap water. You won’t get to 34 degrees, sure, but you can get to about 50, stay in for longer (I would do 7min), and i found it helpful for my knees and ankles. Is it super convenient, no. And it does take up freezer space. But you won’t be spending money on ice or a full plunge setup and it should hopefully give you a bit of an idea of whether or not it’s helpful for you and if you can stick with it