Considering one is coming from Mangalore, it should cost you around ₹650-1000. This cost covers everything including food, which you can get at any local restaurant in Kanhangad.
When to do it
December to February is the best time to go as the weather is pleasant during these months. Summer season (March to June) should be avoided as it gets immensely hot and humid.
Since it is just a one-day trek, the route is fairly simple. Considering one is coming from Mangalore, this is how your route should look like –
Board a train from Mangalore and get off at the Kanhangad Railway Station. It will take you an hour to reach Kanhangad. Ask locals for the bus stand from where you will board a bus to Panathady. The bus stand is at a walkable distance from the railway station. Once you reach Panathady, book a jeep to reach Ranipuram. Make sure you have your jeep driver's contact number because there is no other way to get back from the top.
Mangalore – Kanhangad – Panathady – Ranipuram