Agree. I have had both knees replaced twice and both hips replaced. Although I am fine now, I did have some complications, I recommend one surgery scheduled at minimum 6 months apart, even one year is much better. Give yourself some healing time after each surgery, you just never know what may occur. Knee replacement recovery requires patience, especially in the first few months. If you ignore this you will pay later. Whatever your decision, you will require assistance the first few weeks. I recommend preparing meals in advance, wear good fitting shoes (slip ons if possible) and avoid twisting, fast turn movements when standing/walking. Best wishes.