Marieka,
You are getting very good advice from Colleen, I would add # 10 to the list: get support for your husband. Going through surgeries and treatments can sap your mental as well as physical energies. Just going to doctor appointments and taking tests require much time and energy.
Do let your mother help out. She needs to be there with you as much for herself as for you. No matter how old we are, mothers still worry and want to take care of us. You are too big for her to take on her lap and cuddle in a rocker and you don't need a bandaid and a kiss to make you feel better but there are many other ways she can comfort you. It is very good that your husband is able to take off. Taking care of you, the house and the boys full time sounds overwhelming. He and your mother could work together and support each other. This is a great opportunity for her to enjoy time with the boys and would be a distraction for them.

Malka