Ulcerous foot infection?

I am asking those who had a ulcerous foot infection to perhaps give me some insight on the last part. My foot infection surfaced last mid oct on my right foot where its 1/2 wider than the left foot. Right on the widest place towards the side below the little toe.

I"ve had 2 vascular surgeries, both times the surgeon told me I cant get below the knee cap with the wire during surgery. Man when I hear the word amputation. I sought out a second opinion. During the 3rd surgery the surgeon told me he knew he didnt have the correct tool to get past the knee cap and unblock the blocked arteries going to my foot. Finally the 4 th surgery unblocked the arteries.

Now in mid feb 4 months later I am seeing a plastic surgeon. Last visit he said come back in another week. I am presently waiting for surgery to remove the black scabby part and replace it with new skin. The entire ordeal is very painful, I cant work and watching tv most of the day and night well its better than sitting in the hospital the entire time. My question is after they replace the old with the new skin how long does the take to heal and get to where I can walk again normally?