Free Software is not about price but the freedom to run, examine, modify and to distribute software under the same licence that gives you permission to use the software and that accompanies the software. Usually, that means you pay $0 for the licence. Mostly Free Software is a cooperative product of the world and it is the right way to do IT. Take a look at the Directory of Free Software created by the Free Software Foundation. You’d have to be working with IT in some narrow niche not to be able to do all your work with the software you find there. Add that software to a GNU/Linux operating system like Debian GNU/Linux and you are about as free as you can be.
My favourite Free Softwares are Debian GNU/Linux, LibreOffice office suite, GIMP GNU Image Manipulation Program, ImageMagick, FireFox, MariaDB, Apache web server, PHP scripting and Free Pascal programming. There are many others that I use occasionally but which have many alternatives including software I write for myself.
“The Free Software Directory is a catalog of useful free software that runs under free operating systems. FSF staff and volunteers work together to collect detailed information about free software programs and organize it in a clear and accessible format.”