Do you have a photo of the terrace garden now? There are so many creative vertical gardens right now - I'd love to help come up with the perfect design for your space. I'm sure you've browsed Houzz, but here is a specific search for vertical gardens - the possibilities are endless! https://www.houzz.com/photos/vertical-garden-design-ideas-phbr1-bp~t_724~a_34-281

While doing your electrical works during the interior works you can put conduit from tv to music system.

Hello Sangeeth, You can try using the following ideas: 1. Hooks with special adhesives 2. Magnetic paint 3. Use putty to hang your frames

Suraj, If you have access to the room that you shared earlier you can try seeing the flicker effect at night time with both lights and fan being on. If the lamp has a 360 degree light spread it will cast the fans shadow on the ceiling and when the fan is turned on it causes a flikr effect. I personally find it a distraction and at the same time many would not even notice it. Take the pick based on your usage. Wall mounted fans and recessed fans can also be explored. Thanks, Nitin Cornerstone Designs, Bangalore.