2Brindles, I limited Phoenix's activity from the start, although I did let him run outside a bit. First thing I did was cover every bit of hardwood floor with rubbed backed mats to lessen the possibility of a fall. I did the same with the deck in the backyard. I also walked him more often than i put him in the backyard. By the time he was diagnosed, he was no longer going up and down my inside stairs, but if he was, I would have blocked it off with baby gates, once again to lessen the chance of a fall.
One of the best bits of advice came from the last osteo thread. I live alone, and you said your husband works long hours. It was advised that I come up with a plan in case something happened, like a broken leg. How would I carry screaming, injured dog into my car? Who would help me? I think these are definitely points worth considering.