Create a baby gender calculator

Hello everyone,
I would like to create a one-page website where we offer a baby gender prediction using three different baby gender prediction methods (so three different questions that will contribute to the final answer from the algorithm)
The calculator should look something like this from a graphic standpoint:
https://www.whattoexpect.com/pregnancy/preparing-for-baby/chinese-gender-predictor-chart/
https://www.thewonderweeks.com/pregnancy/tools/baby-gender-predictor/

I will like to know how much this could cost and how much this would take to make

Edit: I will only consider website developers who can recreate a similar design to the whattoexpect.com page and can optimize the website for SEO purposes