Hi Dave,
I recently returned from a week in Malaysia, a week in Thailand,, 3 weeks in Cambodia and 4 weeks in Sri Lanka.
Over all, Cambodia was by far the cheapest for accommodation , food , drink and inland transport.
Thailand ( Bangkok ) and Malaysia ( Kuala Lumpur ) I found to be about the same as Sri Lanka for guest houses and inland transport but both cheaper for food and drink.
No idea regarding India but from communications I've had with Indian travellers they seem to find Sri Lanka relatively expensive,
Rod.

