That sounds like a good compromise. My Marek's girl that learned to lift her leg up out of the way and hop everywhere started off with a numb lower leg and she would stand on her own toes and trip over, then the toes curled underneath and she started to drag her "knuckles" on the ground and they stared to get sores. I tried to strap a little boot to the foot to keep the toes flat but it made her trip even more so I left her to it and she figured out that she could pull it up out of the way and just hop. It probably took about 2 weeks for her to figure it out. You could get some Vet Wrap or other cohesive bandage and cut it into half inch strips and lightly wrap her foot so that she doesn't get sores, but I do wonder if the sores were part of helping her figuring out that she needed to lift it. Having said that, it the lower leg and foot were numb she would be unlikely to feel the sores. Some birds with Marek's seem to have feeling but are unable to coordinate a limb/muscle etc and others appear to have no sensation. There is such a huge variation with it, it is very individual in how it affects each bird and you really just have to play it by ear and go with your gut instinct.
The ones that I have had that have become incapacitated have been kept in an old sideboard that I use as infirmary and broody hen bay, which is within the coop. During the day when the weather is fine I put them out on grass in a large cage and encourage the other birds to forage around them by scattering a bit of scratch. This helps ensure the birds remain part of the flock for at least part of the day and get some sunshine and grass which I have found to be key factors in helping them fight it. The bird that was nest bound for months needed regular cleaning up and food and water were clipped to the side of the nest. Outside she would crawl using her wings and gradually she learned to walk again. I would open the cage at dusk and allow her to try to make her own way back to the coop. It was not pretty watching her crawl and initially I would pick her up and carry her but over time I let her make her own way and slowly but surely she figured out how to get her legs working again or the nerve inflammation subsided and feeling returned although she retained a slight limp. Her and the one that learned to hop were best buddies and I do think the two of them being incapacitated at the same time helped them both to recover. Isolating a sick Marek's bird usually causes it to get depressed and lose interest in food and then they go down hill.
