>>106529262
>I currently have these 4 usb ports in use (mouse, keyboard, webcam, usb-sound card, dongle for controller)
That's 5, unless the keyboard or other device has USB passthrough.
USB ports for that mini PC is 1x USB 2.0, 3x USB 3.0, 1x USB4.0 (Type-C)
Display won't be an issue (triple monitor support).
https://manuals.plus/asin/B0CQ4WBV8L