Here is the start for the project scope, if you can tell me if there's anything else we should also fix:
Meta-description/Header tags etc
Case studies section on the homepage (perhaps similar to [url removed, login to view]), or perhaps a slider
Review keywords in Titles and Descriptions
Discover pages to be improved (for bots/search-engines to crawl and find)
XML Site map – create and submit to search engines
Check Google Search Console for errors
Mobile/responsive frameworks: can this be improved?
Some re-wording on the Menu bar
Improve URLs (when we make extra pages, such as /Blog /investors /Borrow etc.)
Should our pages redirect to HTTPS? (And SSL certificate?) Register these in Search Console
Backlinks – how do we improve/increase this?
Create separate pages (with Read More buttons) for Investors, Borrowers, Blog, About Us (these new pages should look much better, similar to our homepage or another example like: [url removed, login to view])