I have designed a plan based on your requirements:
- modern architectural styles,limited structural change, using friendly materials, the price is acceptable.
The highlight of my design is the change in depth of the block on the facade, door and window position is fixed so I changed the style to bring a new and modern.
I use the wood and ornamental decorative elements to bring home friendly.
The 1st floor surface can use Hardie cement panels or wood panels, you can choose a suitable material for your money.