If you would've told me before free agency started that any team could've had Ariza for 1 year, $15 million I would've thought you were crazy.
Last year the Rockets won 65 games and came within a hair of beating the Warriors in the WCF by (in their words) being "obsessed" with building a wing-dominated, switch-heavy team that could defend the Warriors on one end and spread them out on the other. They've been in the luxury tax since before the dawn of time and knew they'd have a hefty tax bill to keep what is clearly a championship-level team together. It's not like Ariza just signed for 5 years, $135 million or something.
I really hope there's some method to the madness of letting the only 3-and-D wing the Rockets could've given any money to (given their Bird rights) walk to the worst team in the entire league for not that much money and no long-term commitment.