Tissue in prostrate obstructing flow of urine

Initial problem resulted after a surgery on my shoulder and not being able to urinate after the procedure. My doctor has prescribed Tamsulosin and Finasteride for 4 months and suggested I stay on a catheter (changing it every 30 days) until October. He sited my age 79 as a deterrent for Surgery and also after reviewing a look at the prostate (where he noted the tissue blocking) and a Urodynamic test (which he noted was good results as I have a pretty strong bladder). I am not too happy about keeping a catheter for another 3.5 months and then being on the meds for the rest of my life.
Any advice...