The biggest challenge for creating strong, visual sites for an SMB is that these businesses don't very often have good quality images to work with. Therefore it can be a good idea to find stock photos, though it takes time to find good stock photos. So we suggest you find one great image that can be used conceptually in the design, perhaps as a consistent top image across the site.
In mono we also have a a library of images that can be used freely (see the mono image library). You can use these to supplement any stock photos used. In some segments, for example hair salons, SMBs often get permission to use images from their product suppliers.