Hi, i understand your problems and responsibilities, but it is a lengthy process, after surgery also, there may be absolute bed rest
needed, for about 8 weeks, and then at least for an year, you should take care of the knee, till you are comfortable, with the knee.
The time may be suffecient from point to point. But by any chance if it extends more, beyond your prescribed time. So you can post pone the surgery to have a peacefull recovery. Thank you.