Don't propose all such extensions. It would be better to have a train from Kerala to Bangalore, Mysore and then to Mangalore. Say something like TVC ERS PGT CBE SA HSRA SBC MYS HAS and termination at MAQ. Something similar to Amrutha express TVC MDU via Kottayam Ernakulam Palakkad Palani. No PF issues anywhere in SWR as all maintenance will be at SR station only.