Hi there,
As I can see you need relatively big architecture, with surroundings, and all that partially destroyed to fit in cube of 7x7 cm. If I am correct it would be quite a challenge, and I am happy to place my humble candidature for it.
What I can offer is good modelling skills, accurate and reconcilable architecture, good amount of destruction debris, and details (they always look good on a small scale, however I do understand the limitations here). As a bonus I can offer rendering of the product, so that It can be used as a cover image, or some other advertising purposes. All that plus adjustments, positive, and friendly attitude, are offered just for the amazing price of 133.33 euro, almost free :)
Kindly,
Valkan.