How to use Portable Apps on Android

Hello Everyone, I am new to this forum.

I have used Portable Apps for years with much success. I am a big fan of programs that do not write to the registry and use little resources.
I am working on converting a Android TV Box to a PC. This will be used as a mini workstation for office functions. I could put the Apps on a USB or a SD card. This will be mostly used for: Office, Firefox, a photo viewer, Printing, Photoshop etc. The other stuff like Kodi and all of the TV tools would be removed. Can someone give me a little direction on this project? Can this even work at all?

Thank you