I got into the Rhino-Rack RPBS bandwagon. It was on sale just after the lockdown.
There is a minor whirring sound but not as bad as the ones from the baskets. I have the coiled rope there which reduced the sound a bit but I may consider putting a proper wind fairing in front.
I scored a genuine tow bar at a decent price and have just installed it:
The wiring will soon follow. I couldn't find an R79 connector for the trailer wiring. I will call Subaru tomorrow to check if JDM SGs came with a trailer wiring connector. It may have just been placed at a different location. If not, I will just wire the harness manually.