Canadian PR: US land border entry after air entry I-94 questions

[LazyTitan21]

Hi, a PR needing a B1/B2 visa to visit the US here. I have a question which I can't find the answer for anywhere

I have a solo trip to the US next week via air, in which I'll be issued an I-94 right? Less than 30 days after, I'll be crossing the land border along with my family, who'll need to apply for I-94 ahead of the trip (which costs $6 each).

The question is, do I need to re-apply for I-94 (and pay again)? Since I'll be "traveling" to Canada in between the US entries, I think it belongs to the automatic revalidation case, but it doesn't say anything about being Canadian resident.

Anyone with such experience?

 

[Takita]

following

 

[subodhp]

I94 is valid for 6 months, so unless something has changed recently, you will not need to pay 6$ fee within 6 months of your last travel. You would need to pay that for your family however.