Will pick you up on the gym 30 minutes.
2 things - why you spending time going to the gym? OK, space may be an issue, but if you have a 3 metre by 3 metre 10 by 10 old money and North American, you can do a session without any commutes.
30 minutes is tight - why 60second recoveries? 10-12 minutes warm-up, 20-25 mins HIIT session, 10-12 minute cooldown and internal appreciation so you leave glowing with an internal smile to greet people with.
Allow 49mins for a quality session that will cause fresh thinking as the endorphins cause you to answer the question you asked yourself before the session - only multitasking allowed.