This may not be true for everyone but by the end of three weeks after each of my tkrs, I felt more like myself. Obviously didn't feel normal, but I was able to manage on my own. Nothing was getting done around here but I was comfortable moving around in the house, getting a quick meal, etc. If you have a dog or dogs, you might need to figure out how to care for them while he's gone. Chances are you're not going to feel like walking them 3 or 4 times a day.
It was very hard to get this through my head but this recovery isn't linear and it can really fool you. One day will feel a little better, the next day will feel even better and the third day will be miserable. There are lots of hills and valleys in this process and it's best to take each day as it comes. Today has nothing to do with yesterday or tomorrow because your knee is in charge. Good luck...