Watering/Tears droping, Question @ end.

Since teenage I got watering/tear droping problem in both eyes, with many different doctors and their treatments like drops, specks etc (with on improvement) At latest, a doctor consulted that I have some 'Centurion Syndrome' and she explained me what it is, also I searched on internet as well. She said that she can perform a surgery between my eyebrows which will release the skin, resulting the Puntas/Canals opening will come closer to eye which will suck the water from eyes. -ALSO, doc said that the wider opening of puntas needs to be done which she said she'll also do. My question here is, 1)How much do I have to spend for all this including the surgery? 2)After surgery, watering problem will solve for permanently? (She said the watering may come again years after surgery) 3)With every treatment their are risks, What are the risks if I go with this? By answering this you'll let my confused brain relax, well atleast for some time. Thank You Sir/Madam in advance