where is this piece of property? you will need to contact a local architect to help you. most municipalities have front and back yard setback rules as well as side yard rules. you have not indicated what is considered the front or back of the property. without knowing more details, it is impossible to offer you a meaningful comment.

You don't necessarily need only paintings as artwork. You can put some floating shelves near the dining space with some good crockery like plates or tea sets which can be used for occasions as well. On the wall in the living space you could keep either traditional or modern show pieces.

HDF is High Density Fibreboard as opposed to MDF which is medium density fibreboard. If sealed properly it can be used outdoors as panels set within hardwood frames. Better still is marine grade plywood

Vinay, Since you have hired a professional, not sure how much of below will make any sense. This is a tall-boi room and the windows and doors height add to it. You have quite a good exterior view with surrounding greenery but the messy grills have kind of killed that view. You may have to always use sheer to hide them and coupled with earthen colored curtains. Plain bland white walls is another thing you may want to reconsider. Without going into too much details, a clean contemporary look for this place would be best suited. The ceiling lighting doesn't seem sufficient for a 14*15 room and I feel there is too much of wood on the ceilings even in the other parts of the house. As of now it looks like a transit place and glad to see this being made a permanent home. Will be eager to see the end results. Thanks Nitin Cornerstone Designs, Bangalore.