It’s a great idea Kiran. Best of luck with it. It would be nice if you could start something like a blog and share your experiences with the rest of us.
I’ve heard that the water around kodai is extremely good for the plants (almost like “mineral water” someone said! ) and that you can grow exotic and high value flowers there very easily. Have you thought about this?
Other than Rambutan, the other stuff such as beans, potatoes, okra and pappaya can be grow in difficult conditions like Chennai itself. I’m sure there’s a lot of stuff that you can grow in the altitudes of Kodai that cant be produced anywhere else. Try looking at neighboring farms and talk to farmers as well. Maybe you’ll find something that generates a lot more revenue that what your looking at.
I wish you the best of luck with this venture.
P.S - I LOVE RAMBUTANS! So be sure to send me some when you have your first produce