(TL:DR at bottom)

  So what I want to do is upgrade to a PS4 pro,

but to be able to afford that I'm going to have to trade in my Xbox one and all of it's games, along with my current PS4 and a couple of the games that I never play anymore.

My questions that I can't seem to get a straight answer to are as follows: What can I do to get that done and keep all of my data and digital games I've purchased?

I have purchased PS and uploaded all of my save data so I'm not too terribly worried about that but I have 8 digital games and 7 physical;

so my question is how can I get those all transferred without having to spend extra cash and keep my current PS4 around?

I called and asked both GameStop and best buy I got an I don't know answer from both.

None of my friends have a pro so they can't help me with that and I've googled... I can't find anything and maybe I'm just bad at web searching but I'm at a loss of what to do..

TL;DR: I want to upgrade to PS4 pro need trade in credit to afford and don't want to spend too much to keep current PS4 around to be able to transfer everything. Can't find any answers. Help?