hi all 
im new here. 
i would like to check, if it is advisable to to hack a wall after moved in for >1yr? how is the charges? 
this 'corridor' from living room to bedrooms in my house is very dim even during the day. and i have been leaving the standing light on day time....  
i have been thinking for ways to brighten the area:- 
1.  on light 24hr/during day time (am currently doing this, but want to save elect bill now) 
2.  Hack away the whole wall which is separating the area and the balcony, and make a glass bi-fold door. 
3.  hack partial wall and do a window panel 
if, i really want to hack the wall, anyone has the estimated charges for hacking? 
and also, how long it takes for the contractor to complete the job? 
Thank you very much!!!