Thanx for your concern but i have checked APSRTC bus schedule from BZA to Srisailam. It takes 6-7 hrs and available from 6 am till late afternoon. Further i have called a taxi operator based at BZA. He quoted 4500+ toll for to & fro visit by AC Indica. My plan is for one night stay at Srisailam n then start from Srisailam to BZA around noon and reach BZA by 7 pm. Train from BZA to TPTY is at 11 pm.
Hope it works. If i am wrong just let me know.