First, there is no reason to purchase a Chromebook. You can convert any PC to run ChromeOS Flex.
https://chromeenterprise.google/os/chromeosflex/
Create a USB stick with the Chrome image and boot from it on your PC. You can test drive all of it from the USB stick. If you decide you like it...
Don't replace the hardware, replace the operating system. Windows is so bloated and unnecessary for many people.
Try ChromeOS Flex as an alternative. https://chromeenterprise.google/os/chromeosflex/?sjid=11928927057111500321-NA
It can take an old pc and give it a new life. My system is from...