How long do i have to decide on what type of treatments for kidney cancer?

Not too long: Depending on the size and appearance usually not too long since your absolute best chance of cure is to not let the tumor spread or metastasize. Metastatic renal cell cancer is very very aggressive and hard to treat.

How long do you want: One hard part of treating cancer is that progression from local tumor to metastasis is unpredictable. Nobody knows when that will happen and no imaging study can detect the tiny initial lesion(s). Some patients with apparently confined disease develop mets years after surgery, likely indicating prior spread. Because of this uncertainty, treating kidney cancer earlier is better than later.

Kidney cancer: If diagnosed with such a cancer i advise to within a month, if the lesion is in the t1 category you do have more time most likely. Always get a second opinion before any procedure.