i want develop and add features for my WordPress online store site

I have a WordPress site and I want to develop it and add some features 1-add the following to the filter: Country / nationality, Online Members 2 - Add the last appearance of the member (add and show when browsing the profile of the member) 3. Revenue report (calculated on the delivered services ) The report can be reviewed by date. The report contains (service name, member name, service delivery date, service value, site commission value, if Normal order or custom request) Can print report + export report to excel 4. Hide the "Delay" Service button from the sellers Control Panel Make this feature appear automatically I want the service status becomes "late" if the sellers late by deliver services. 5 - Add an option for admin website to determine how many days the seller should wait - after service delivery- to allow him to request the withdrawal of profits. 6- Add an option for admin website to make the calculation of amounts that can be withdrawn by the seller is only the profits resulting from sales and does not include the amounts transferred from his account in PayPal or other credit card… 7. Add an option to the webmaster to hide the profit request by transferring to the bank. 8. Add a notification to the chat system (the notification reaches if the member signed-in profile) 9- i want build all features ( 8 points above ) as plugin 10- developer must grantee that this plugin and site work correctly now and if i update the site for new version may be available in the future . 11- developer must grantee no conflict with current template (site), and no slow i will send site URL on privet