We are currently using Odoo 18.2 Online, or SaaS.

I know there are a lot of ready-made modules out there, but they are for the community version only.

I tried searching online, but I only saw this answer by Ray Carnes. The answer was for an old version of Odoo, and it is not working with the latest versions. 

Currently, I'm still trying to find a workaround in views, but I am having a hard time with inheriting these classes and tables:

Also having trouble finding the view and hiding the price of this.

I just want to hide the prices in guest or public viewing, that's all. Using the Prevent Sale of Zero Priced Product is not an option for us.