Data Entry - Magento Store

Have a magento store with 30,000 records/products. Products currently have sku and descriptions that have typos in them. Some SKu's are/were for local store so will not show in any universal database (eg bakery, fruits, vegetables). Will need to find pictures for them and properly code those records. Of the 30,000 records, approximately 5000 are like those previously described the remainder are universal/international SKU valued. Will need help processing the records and coding the csv files for upload. Will have pictures that will have to be renamed and there file names associated with each record. Some data i have, others you may have find. Payment will be made periodically based on properly coded records. Payments will only be made after csv file for a batch has been received/uploaded to site and checked. Would therefore prefer to pay per record properly coded.