I can't believe the way your husband has been treated. Just shows you how important it is to go to the right people.
I feel for you what you must be going through right now. It's a good thing you went to get another opinion from a different surgeon. I know it's hard waiting, but best to wait and see what the new surgeon says. Currently I'm waiting to see my knee surgeon after I had scans done a couple of weeks ago. I have to wait 6 weeks from the last time I saw him. It's really hard, but I just have to be patient as he's one of the best for patella instability in Melbourne. Whereabouts are you based ?
It may also be worth going to see a sports physician. They may be able to give you some good ideas on your husband's rehabilitation and whether he will be able to do anything at this time. Might just help until the new surgeon is back from holidays.
Has your regular doctor done any blood tests ? This can help to determine if there's any infection. Can also often tell by looking at the wound. When I had my last knee operation I developed an infection afterwards. It took two lots of anti-biotics until it completed cleared up. My stiches were also coming through the skin so my knee surgeon had to take out the offending stich.
I would also encourage your husband to continue icing throughout the day. Don't ice it for more than 20 minutes at a time. If he does it every couple of hours it should help with the swelling. Also, it's important to get on top of the pain. At the moment I'm recovering my shoulder surgery and is still very painful. So, at night I'm taking Panadeine Forte and then Panadeine or Panadol during the day.
Good luck and let us know how you go.