As Sajin said, ask him to check for retiring rooms at Central itself. Think they will all be booked by this time. In case they are booked, he can exit the station premises both from Wall Tax Road side (PF1) as well the Moore Market Complex (PF11) side and walk till Sydenhams Road abutting Corporation of Greater Chennai (locally known as Ripon Building). Let him take the main road at midnight hours and not those small lanes by Moore Market Complex to reach Sydenhams Road. Both sides have enough affordable accomodation facilities with Sydenhams side offering online bookings as well. Language shouldn't be also a problem in that part of the city. Someone please translate this back to him in Hindi.