After reading your post, I do have a few questions. You have had multiple TURBs....was this because of recurring tumors? You also mention BCG. Was this after a recurrence? BCG is not usually prescribed for low grade unless it has come back.
If low grade bladder cancer has returned more than once I would be a bit concerned. It may be time to seek a second opinion with a urologist at a center that sees LOTS of bladder cancer patients. If you let us know your geographic location, others may have some suggestions for you. Recurring bladder cancer is not something to fool around with!
Jack has posted a series of excellent sources of the most current thinking and guidelines on treatment of bladder cancer that you might wish to peruse:
bladdercancersupport.org/forum/20-caregivers-questions-and-comments/46011-husband-diagnosed-with-bc-t1-high-grade-transitional-cell-non-invasive.html#55164
Hope this helps a bit
Sara Anne