I live alone with my dog, and went through both TKRs by myself. I did have help from a few good friends, plus people from my church took turns giving me rides to/from the hospital and various other places. One friend watched my dog while I was in the hospital. Several people from my church brought me meals my first week home, so I didn't have to cook. Prior to both my surgeries, I stocked up on non perishable items, including applesauce cups, and soft granola bars. These came in handy if I needed to take a pain pill at night, and didn't want to walk downstairs to the kitchen. I also carried a small tote bag on my walker, with my phone and charger, my tablet and charger, pain pills, the granola bars, and bottle of water. I also brought the bag upstairs at night and kept it next to my bed.
I made sure my house was free of tripping hazards. Next to my recliner, I have an end table, which I used to keep my phone and TV remote, plus more water. I have a fenced in yard, so my dog could go potty, and run around and get exercise without having to be walked. Several friends live nearby, in case I needed help with anything. It is possible to get through this process alone and be ok!!