Data Research and Data Entry - Populate Spreadsheet

I have almost 2100 records that needs multiple fields updated. This will require web research for accuracy of each line item, verifying the website, and attaining all the info needed in the blank fields on each line. Please review the 3 spreadsheets and multiple tabs within each. If you are not able to do this project, then let me know. If you are able, then please quote me a price. Thoroughly research each spreadsheet and tabs within each spreadsheet for needed data left blank in each line and column. Only then please give me a price. I am sending out here as well as on another site. I need this quote and an estimation of time. Let me know as soon as possible as I am ready to hire. There will be much additional work after this. I am looking for 100% accuracy from going to each's website. Where info cannot be found, please put in N/A in the field. I will be checking behind you for accuracy. Please do not bid without reviewing the files and needed info. If you are selected for the project, then you are responsible for all the data with 100% accuracy. 25% will be paid down up front with the additional paid only after the data is received and verified to be accurate.