Make an installment plugin for a Wordpress website

Make an installment plugin for a Wordpress site so that you can flexibly configure installment terms for each product, the client chose to pay in installments or for the full amount in the checkout and could pay current installment payments in their personal account.

Detailed TOR: https://docs.google.com/document/d/17rd_Xa69Qg_u3b...

Send your estimate of the cost and time for creation in the response.