Brethren, I'm so sorry this happened to your DH. I had a situation in '04 where I crushed my left leg just below the knee and my knee cartilage was shoved down a few inches. I had a similar (bigger) fixator until the repair surgery and recovery did take about 6 months as I slowly made my way from one aid to the last. If they offer any type of rehabilitation service after his surgery, it would be good to do. They teach you everything you need to know in getting around while not being mobile. I would never have thought to maneuver in some of the ways they showed me. It was really helpful.DH had an accident at work today. A 36' long, 18" tall, 1400 lb metal beam rolled over on his leg. Surgery to stabilize it today, surgery to repair in about 2 weeks. Possibly a third surgery down the road. The ankle is pretty crushed. They called it a pilon fracture. Will be a long road to recovery. We are waiting for a cat scan to see if the joint cartilage was damaged at all. They are hopeful that it is intact. Even without damage to the cartilage/joint, the orthopedic surgeon said it will probably be 6 months before he might be able to walk without some kind of aid. There will be no walking of any kind for a number of weeks as it is. If you choose to see it, the pictures below show post op stabilization of the leg.
I will keep your DH in mind and hope everything goes okay for you both over the next few weeks.

Is your home warm enough for shorts? Otherwise, the sweat pant/velcro idea sounds pretty good.what is he going to be able to wear? It's not like a pants leg will fit over or around this contraption.
For now, I think I will get some rest. Have a feeling I will be needing it.