@tdez I agree with @heysoundude and @LaidbackFred. Buy the most powerful device you can afford. Given that you mainly plan to use streaming services, you could choose a device with less storage, but newer processor.
For reference, I’m currently running djay Pro AI on an iPad Air 4 and iPhone 11 with zero issues.
Also when you get your “new” iPad here are some tips to maximize performance and stability:
