hi

It largely depends on what is adjacent to the site. If there are adjacent built properties then you may find it difficult to blast the rock. only way would be manual breaking, which will consume time and money.
if the plot was large enough it would be worth to do so.

hi vinay

There seems to be a leakage in the wall. Is there a toilet WC adjacent or above the wardrobe.
Or
If its a exterior wall, you may have to check the plaster and get it redone.