Yeah, I agree about the deadlift. I can't recall Poliquin recommending it for 10x10, I was merely replying to the OP's comment about using it.
Well people have been pushing and pulling heavy objects for millennia for performance so the Prowler ain't exactly new! And I agree, few people likely have access to one. I certainly don't. As I said, I went for a homemade tyre sled, which is a close second to the Prowler.