Magento 2 - Ebay Integration

I want to upload eBay products onto my website and I will use the eBay Item ID as the SKU number. I need a custom script as below: The script needs to use API provided by eBay to do the following. 1- Update website price and keep at a percentage of eBay price (eg: ebay price is £10, price on our website will be £13 - if ebay listing price has changed to £100 and we run script, our website price should change to £130). I should be able to change percentage as required. The percentage will apply to all products. 2- Update inventory with eBay listing. 3- Generate a report each time showing 1) any listings which have been removed by eBay seller and 2) any listings which have 0 inventory continuously for over a month (stale listing) and 3) Any listing where price has been increased by over 100% by eBay seller 4- We will store all eBay SKUs on a file on server and the script needs to auto-run every day and email the report. We will update any new eBay items added on the file with new eBay ID numbers. Project Fee: 7K - 9K