Personal Project - total new website / Investing Related

Need help with a Personal Project - total new website

1 - want to buy a template and customize a site (to make it cost effective) that looks like follow “Capital - Solid Mortgage Company HTML Landing Page Template” from https://www.templatemonster.com/ site (https://www.templatemonster.com/templates.php?text=Capital+-+Solid+Mortgage+Company+HTML+Landing+Page+Template )
(I can buy the template and need your expertise in modifying


2 - What will website do?
Stock Picking Service Reviews + Tracks Performance over-time (search-able data of services + performance details of each service – I will provide the data and I will update in future no api needed) https://www.ndaqsystem.com/2021.html look at this page. I will review similar sites and compare if person invest how much money will be made over time etc

3 - search feature of all services to look like attached page – info will be pulled from database. I will manage and update database.

4 – A page with service reviews, and a table of trade data that is sort-able and excel export feature

5 - one page on site that will be a BLOG

6 - subscribe email feature / unsubscribe

How much will the full working site with features cost please?

Some features that are my wish list - how much will these cost?
- toggle button to change the colors of text and background on webpage
- find ideal service option – user will get a choice of service to narrow search and get ideal service ( for example, free trail yes or no > Cost $50+ a month or $100+ > trades stock or options or both > etc

How much will front-end and back-end full functional site cost please. Its a personal project with limited money so I don't want to start something that I cant afford.. THANK YOU for YOUR time in advance!