MrStreisand Would really appreciate thoughts and input on the matter, as i can't wait to use the phone, but i'd like to set it up properly.
Starting with the last part first: I wouldn't worry about it. I've wiped my phone multiple times and rearranged things to my liking. You won't know what you want or how you want things set up until you actually try them out.
MrStreisand So do i use obtanium only to OBTAIN (couldn't resist, sorry) the apps not present in gPlay? What logic would you suggest?
To be honest, it doesn't matter if you ask me. I personally install with Obtainium if I can, then use other app stores if I can. Google Play is my second to last go-to, and F-Droid is my always my last.
MrStreisand none of the apps downloaded from play store will be able to communicate to google if they are used in a different profile so it doesn't really metter the 'origins' of the app, as long as you trust the source?
It doesn't matter. Apps won't know they were installed using a specific Google account and then expect Google Play to be installed and logged in to that account (that said, I have no idea how paid apps work. Maybe they check with Google Play Services upon installation using some API).
MrStreisand Why manage all the apps on the owner
I personally don't do that, nor would I suggest it. I prefer owner to be completely empty.
MrStreisand wouldn't it be more logical to create an 'app manager profile' and use that to do the updates?
I wanted to that once, but I never used the app management profile, so I gave up on this idea, personally.