Actually sc- yadadri MMTS ( special double track) or Metro corridor should extend up to warangal in phase -2 , up to khammam in phase-3 and up to BZA in phase -4 . So no need to think about chair car or reservation. Just timepass for three hours from bza to sc, only one ЁЯОе time with onion samosa. Every 15 min one train in day and every 1 hour one train in night. I think it can be easily possible as you said khammam is verry strong ЁЯТк.