there are no varieties of teak which develop fully in 10 years
Dont fall for the marketing gimmick
generally teak sapling should be planted with atleast 7 ft of distance from each other.
Just visit your local government nursery to get saplings
the cost varies on the basis of size of plant
i would suggest buying sapling which are atleast 2-3 ft in height even though they are a bit costly rs 15-25