Hmm, how does ps4 handle temporarily losing internet connection? I want to use the pro as my secondary, but does that mean that if I get wifi interference in my game room, any (offline) digital game I'm playing will quit out? Or is it only when starting a game that it checks? Or even earlier when you start up the console and sign in to your profile? Can you sign out of psn after starting one of your digital games on a secondary ps4?

I better buy some more physical psvr games just in case :) Much less worries.

If that's your life, I feel sorry for you. Life revolves around what you make it revolve around, and money is just one (potentially big) part of it.

You can have any one single profile installed on as many PS devices as you want. On PS4, you have to enable the console as your "primary" console at your discretion - what that means is that you can play your games online or offline or on a different account, but only on that primary ps4. Any other ps4 you want to play the same account with, must be signed in online. So, you can have the same account on two PS4s. On your primary ps4, you can access that account in offline mode and play anything without Having to sign in to PSN. On any other ps4 that your account is installed on, you must be signed in online to play your games. 

Edit - so for your situation, set your ps4pro as primary so that you can access everything online or offline, and so that all of that content can be accessed by other accounts on the primary ps4pro, and then keep your account installed on the other ps4 and just make sure you have the Og plugged into the Internet when you want to use it. I realize this might sound a little confusing 

Nope, that's for everyone, if you don't have money you can't make much. But if you want to feel better than me or pitty me go ahead.

Even more when we are talking about working and companies, the reason they do what they do is for a wage and profits, so working for free isn't the best idea to impose. So Sony leave it open, if company wants to do it without charge as a gesture of thank you for its customer they can, if they want to make a big improvement and charge for it they can as well. This patch could be the same as the remasters in the level of work, so why prohibit them from charging? The prohibition would only end up limiting what you could get on the patches.

I think with digital games in general the game would lock you out (think in game popup, something akin to asking you to sign in) if it lost a signal and the ps4 wasn't primary, but if it was just a temporary disruption like you mentioned then you can run the Internet test under the OS settings, switch back over to that game and pick up right where you were without losing any progress or having to restart the app. It depends on the game (online only game, offline only game) and probably to some degree on how the developers coded the game to handle something like that. I'm sure some games would require a full reboot. The division is a game for instance that would send you back to the menu screen, but that game is always online.

With that being said, I don't think this is a "check in once" type situation. It's a "you need access to the Internet to play" type deal, and it's because of piracy/game sharing reasons. So no, you can't log in to your secondary Ps4, connect to the Internet, get access to your account and then log offline while keeping access to your account. You need to be online. Otherwise you will only be able to use non gaming functions on the ps4 in question. 

***If I were you, I would set up whichever console you want others to be able to access your games on as the primary console. This way, they can create their own account and have access to your games regardless of if you are signed in or out on the primary ps4. Then whichever console is yours and won't have others on it, make that one be secondary so that you have to be online to play your account. By doing this you can gain simulataneous access to the same digital content from the same profile across two different PS4s at once. <--that's literally how you game share on the ps4, and you can only do it with up to two ps4s at once.

I couldn't recommend wi fi to anyone for gaming because of signal disruption, and the fact that my living space is crowded with neighboring signals which makes it a lot harder for me to maintain a stable connection. Ethernet ftw

 This one. 

https://www.amazon.com/Samsung-Momentus-2-5-inch-Drive-ST4000LM016/dp/B016YFEYK6/ref=sr_1_1?ie=UTF8&qid=1478387429&sr=8-1&keywords=samsung+2.5+sata+4+TB

Well, that certainly doesn't describe my life, so speak for yourself.

I didn't say they should be imposed to work for free. I never said games should be updated to take advantage of Pro, which means no work is imposed. Other than that, I understand your point of view, but I don't really agree with it (at all). Following the same logic, I think Sony shouldn't even control what games get released on PS4. I mean, it should be up to the consumers to decide, no? If you want to curate what happens on your platform, there's no reason you can't curate updates as well (if that's what you want).

I'm happy that you don't need money to live, most people need it.

For me sony could live it free for others to publish whatever they want, but seeing how android can get caotic and psn being a private space I accept they decide what can or not be released. But what I'm saying is quite different, is that if you demand that any patch is free then most of them can decide not to make it, but guess what you are free to not pay for the ones they charge, so why would you complain about the possibility?

Of course I need money to live, my life just doesn't revolve around it.

I don't really see much difference between the two cases. Pretty much everything you said also applies to new releases, so why curate what gets released on a console since you can just decide not to pay?