This is really cool and useful, thank you for the guide. That being said, for anyone who wants just an easy out of the box setup I reccomend attifyos. It had limesuite and gqrx etc pre installed, I just had to pop in POTHOS.
So not to take away from your post because it is quite helpful and insightful, but if you want something that just works out of the box https://github.com/adi0x90/attifyos has been highly successful for me.