The nearest railway station to the gateway of Buddhism is New Jalpaiguri or shortly NJP. We reached NJP at around 3:30 AM & hired a cab to Namchi. Cost us 3000. There are no direct sharing basis cabs to Namchi.
The road to Namchi is scenic but its under construction in parts and hence disturbing.
We had booked a homestay this time: Bumtar Villa from Booking.com. It was awesome. The hosts were very helpful and polite. The property was scenic as well. Plus they have a lot of dogs.