Juliet

Thinking of removing my current false ceiling in living and dining area and install L box. Is it possible not to remove the false ceiling and cut them to become L box instead? Below the false ceiling there's cornices. Need advice on: 1. If false ceiling has to be removed, any removal cost involved? 2. How much is the installation of L box (min & max)? 3. Any recommendation for down lights & cost? 4. Need to install fan also