First of all the images you posted you cant make anything out what you got there. Secondly you should contact a local Architect when doing something like this, not only for structural reasons, but window design as well. He will layout window detail based on the window sizes available from a certain manufacturer or you can take his drawings which indicate opening detail to a place who sells windows, and they have catalogs of window combinations and sizes to make it work with what you have.

alternate option is wooden framework with flexiply ,finished with plain veneer& paint or duco finish

A typical partition or anything on the floor may make the space look constrained. I'd suggest you just use a different finish of flooring to partition the space...for e.g. you can have wooden flooring installed on top of the tiles in the area where the sofa is kept - to the human eye this will both partition the space as well as maintain the spaciousness.

Hello Deezpage, Before implementation take care of certain points, 1) In the master bathroom do you need two different basins + two different bathing area ( shower trey + bath tub)? Instead you can make it look bigger in size by providing the fixtures and fittings which you need. 2) Master bedroom wardrobe section --you can demolish the wall and provide wardrobe as a partition which will give more openness to the room and will be more effective from the interior point. 3) I agree with cornerstone about changing the kitchen door position and shifting it on the dining room side which will be convenient for the person working in the kitchen and will give a finished look in the foyer area. 4) For the laundry area you can use the upper side for the storage and lower area for the washing machine. 5)Kitchen requires more detailing then other rooms. My suggestion will be to consult a professional instead of planning on your own. For any king of help, you can feel free to contact us.