As an alternative to the ice machine I used Gel Ice packs that were recommended to me, and I highly recommend them as well if you go this route. I used 3 and rotated them.

Chattanooga ColPac - Reusable Gel Ice Pack - Black Polyurethane - Standard - 10 in x 13.5 in - Cold Therapy - Knee, Arm, Elbow, Shoulder, Back - Aches, Swelling, Bruises, Sprains, Inflammation https://www.amazon.com/dp/B001W3FXWY/ref=cm_sw_r_cp_api_glt_fabc_EAZYCQZMPPDXCDEHTBN7?_encoding=UTF8&psc=1