Not being able to lie flat mets to back and still walking with crutches

Sorry to hear your bone troubles. My dad has it too. He gets radiation on the parts of the back which are really bad. He has bone mets in many places and if it gets unbearable they zap it with radiation and if that doesnt work he has his high end pain killers.
He is loathe to want to use his wheelie walker but if we are in a shopping center, we have discovered if he has a supermarket trolly to push, he seems to be able to get around better.