There really is no reason to buy the PS5 version at such a high price. Get the PS4 version since it gets the PS5 update. The DLC is roughly 5+ hours long so I don't think that's worth $60+ for the PS5 disc or $20 for just the DLC.
You can get the PS4 version for $30-$40, do that instead.
less than that with the gamefly groupon deal. should be around 10.79 iirc if its 30.