Ecommerce seller needs backgrounds of photos removed, all objects on white background

We are an ecommerce seller of various items. Our in house staff takes photos, and we need the backgrounds from those photos removed so our products are on a clean white background. We'd also like the images cropped for no white space surrounding the items (but cropping is optional). Photos would be done in batches. Can offer them in different volumes from 100 to 1000 at a time. Would prefer an ongoing relationship with a freelancer but could do it as a 1 shot each time just as easily. I've uploaded a few before and after images so you know what we're looking for. We literally sell everything, so our pictures range from these hard goods, to clothes, computers, parts, accessories, silverware (our current project), to car parts, jewelery, and anything and everything in between. So pictures can and will be of everything.