The Samarth ATC provide both cottages and tents, and I found the latter a better experience. On payment basis, they provide meals as well which is so damn down right tasty and homely and so wonderful !!
Staying in one of the tent is a nice experience and the beach is just a few steps away. You'll be able to watch the sunset from there as well !
If you want real konkani stay with konkani food then this place is for you.