I would usually do this as a custom PHP app but time and cost are important considerations for this project. You'll notice in the attached wireframes that wordpress has not been mentioned. Please ignore this omission as I do in fact want this done on wordpress.
Please note that I am not interested in a design service. I am more focused on the functionality of the site and the underlying workflow.
The site will need to import data from a few (8) third-party APIs and then use the data to flesh out the site. Custom post types and custom fields should preferrably be coded into the solution but I would consider using plugins like Pods and/or ACF.
For the most part the wireframes cover all features.