Scene includes 5 differend wall sections. You can clone them to make long wall.
Graffiti can be removed: change graffiti.jpg to no_graffiti.jpg in Material editor.
One section: 4140 polys, 4138 verts 464x220x15 cm
Centimeter units are used. No ngons. All objects at 100% scale, placed at (0,0,0) origin.
All objects are in 'Wall' layer. No cleaning up necessary. Turn off 'environment' layer, add model to your scene and start rendering. 'environment' layer contains background and lighting to render as on thumbnails.