you have the right to do what you want but does a delay really make medical sense? are you considering this for financial or other personal reasons? i don't know why you would want to delay. i don't know you or your case to advise you in this matter so i strongly suggest that you take the expert advice of the urologist who is treating you or see a second urologist for an official "second opinion".
is it ok to delay surgery for kidney cancer for a few months? . urologist said cancer was stage 1