If you're looking for 1 brand to address all of your car care needs I would go with swissvax except for the wheels. I noticed on your list of cars that 2 of them have carbon-ceramic brakes for which I strongly recommend P21S wheel cleaner (safest wheel cleaner for those extremely delicate rotors).

That's my professional opinion

 

Eleven posts.

What would you recommend for him?

Many have said, detailing products are mainly personal opinion. I'm going to list my products and most will think I'm a lunatic. But, it's all personal preference and what works for you.

For wash, I use Meguiar's Ultimate Wash and Wax with a wool mit. When I wash my wheels, I use Sonax, it's incredible and I've tested a few different wheel cleaners, and it's simply the best, bar none. When I wax, it's AutoGlym HD, tire dressing is a single coat of Turtle Wax tire shine. Windows is the RainX foam cleaner.

It's all over the place, but it works for me.

 

Turtle Wax has about 10 different tire shines, Which One?

 

Okay. Exact answers? Wash = Meguiar's Gold Class Wash. Bar = None, although to get rid of holograms I'll use Meguiar's ScratchX. Wax = Meguiar's Gold Class Class Wax. Rim Cleaner = Some Black Magic Spray. Tire Dressing = some Meguiar's spray (I usually use the foam stuff). Chrome = Turtle Wax Chrome Wax.

Interior stuff... Dashboard cleaner = Meguiar's Interior Quik Detailer. Leather Cleaner = Blue Magic Leather and Vinyl Cleaner, followed by a treatment of Meguiar's Gold Class Leather Conditioner. Windows = water and squeegee to clean, followed by RainX.