You most certainly can create forms that let you to make custom entries, posts, pages, profiles, and more. If you're in over your head and could use some help, you could post in the Paid Help Wanted forum here or tap into the great talent at Formidable Masterminds (many of whom answer questions here, too!). :) 

Formidable Masterminds

https://formidable-masterminds.com/project-application/

 TIP: The folks at Formidable make a full Business Directory web app that you can easily configure, customize and extend that might save you tons of time. Lots of features, like interactive business listings:

https://businessdirectoryplugin.com/

 Potential DIY path forward:

1. Create a form that lets business owners register and create an account

2. Create a form that has all of the fields you want in a business profile

3. Create a form that lets non-business owners register and create an account

4. Create a form that has all the fields you want for a non-business owner's profile

5. Enable front-end editing of form entries, with setting configured for your use cases

6. Create a View for the business profiles - the "posts": one for the business owners to interact with

7. Create a View for the non-business owners to interact with

 For the solution above, you could conceivably use a single view and conditional logic to enable features unique to business owners and non-business owners; if a business owner is logged in, you can have all the fields be inline editable, so they can manage their own listings, for example. If a non-business owner is signed in, you could have it show fields for them, to let them rate businesses and leave testimonials, for instance. So many ways to build great web apps with Formidable!  

Formidable Tutorials and Courses The Formidable tutorial on creating and displaying real estate listings may be a good starting point for building from scratch. Think of the listings as the posts created by business owners.

https://formidableforms.com/knowledgebase/use-formidable-pro-for-real-estate-listings/

The Formidable course on creating a Job Board is a deeper dive into a more complex web app. Think of Job Posters as the business, the "jobs" are the posts that people interact with, and the job applicants as the non-business owner people.

https://formidableforms.com/knowledgebase/create-wordpress-job-board/

   Hope this info gives you good options for getting your thing built! :)