Updating this post:
I bought a land at BlueStore stage 20 (Last stage) a few weeks ago.. after a few days i went to look for a builder and excitedly get a quotation. I was specific on the site cost as this is what everyone wants to know first. The initial estimate is $13,000 that includes the rock removal, thought that it was not too high as from my research it can go upto 15-17K. I paid the deposit and waited for a couple of days... then the builder sent me another quote and told me that they have increased the site cost and it includes slab etc.. I have to pay 19K+ for rock removal alone plus a 6K+ for slab upgrade, WHAT!!!! it goes up almost 26K for that alone!!.