From what I gathered there is no other way than to just bite the bullet and take up hotbar slots just for this purpose in order to open all the windows at once without worry. I was really hoping to save hotbar slots but doubt there is a hotkey for it with the xbox or ps4 controller unless there is but the information on google is hard to find due to possibly my inability to type the proper keywords. Everyone just gives the standard open your menu with start and click on inventory, but if you than go back to start and click on character to get both menus open it closes inventory. It is a technical issue but one I personally think is just ffxiv being ffxiv. So if anyone else is looking for an answer for right now I think their is no way to take up hotbar space but setting the individual items (Inventory, Character, and chocobo saddlebag) in order to have all of the menus opened at once without the start button on your controller just closing the last thing you had opened.