What can we expect from my husband's seperated rib?

My husband is training with an MMA fighter and was looking forward to a cage fight in August. He was sparring tonight and took a front kick to the ribs and he heard a pop and had nearly unbearable pain for like 5 or 10 minutes. He came home and I had to undress him and help him dry off after he rinsed in the shower. We are using hot then cold packs in alternation, and I gave him 2 Ultram and a Flexeril. We will ace wrap it before bed and are going to the walk in clinic in the morning. I just wanted to know what we can expect from this injury. Will he be able to work? If no, how much time off, etc. (He works in a vaccum factory and lifts up to 75 lb boxes multiple times a day) I read that it takes up to 2 or 3 months to heal. Does it really take that long and will he still be able to train and do MMA fighting? Any advice etc. is appreciated. thanks