For a really long-term optimization, it will take a week at least for me but I will guarantee you that your site will load faster if new data is inserted because I will add automation to it s0, you don't have to face it again.
I will you get your work done in decided time and I will cooperate until you are satisfied with the product.
I have 9 years experience in responsive website, Wordpress, shopping site, woo-commerce, html5, css3, mobile apps, ionic, Laravel, PHP, MySQL, Jquery, Javascript, Nodejs, Angularjs