I am just proposing for you to reach your high level targets you need to move to Backward integration. Your own accessories, designing, all related constructions which you are going to make your interiors better quality do maximum you can go towards the Backward Integration.
Then through R & D you are adding special values to your apartment where other competitor cannot easily be done. Specials Glass decoration, walls with several minerals .as these can be done as per your own by moving to backward integration .your Glass were in mineral processing before you sell to Blackstone , Glass decorations, Good solid structural steels we were designed for the big plants, when I was in the Piramal Glass Sri Lankan, who was the first technology developer by introducing two new technologies to the Sri Lankan Glass sector.which the own designed Silica Processing plant my own 10 years R & D journey which exactly uplifted the Sri Lankan Glass, hidden story, through my 10 years R & D journey done in 6 to 7 countries.Can you make your most construction minerals under your operations moving to Backward, all timber seasoning, decorations and all PVC sheets through own extrusion machinery .etc.BI is the strength is my view .You can cut your cost by 1/4th and make the price of the apartment more competitive.