Starlink is coming out with a Mini in the next couple of months in select markets to start. Cost expected to be about half of the Standard, not sure about cost of plans yet.
I just purchased the AF1, in the manual there are instructions for plugging the vacuum port. Not installed yet. I’m out of town so I can’t post a picture.
Some motor homes towing a car have added a receiver that can accommodate a bike rack in addition to towing a car. Check etrailer.com give them a call, they may have a solution for you.