Their cap situation is beyond fucked. Just with those three, and Ayton the suns are at $162,866,661. Then assuming they fill out the roster solely with rookie minimums they're at $174,998,880, below the second apron by a little under 5 million. I see them wanting some vets though so let's be generous and assume 2 million average for the rest of the roster slots then they're at $184,866,661.
TLDR: Second apron is Suns' father.
Definitely, they have their work cut out for them in regard to maneuvering the CBA. In a vacuum though this trade is incredible from an asset perspective haha, so as long as the front office maneuvers it well you should be extremely good. Having a full season together to gel should help a ton too imo.