One can be a good connoisseur without Owning/collecting swords (BTW, it is the same for allart fields).
How many Rembrandt experts own one? Same for Van Gogh. Owning swords is a pleasure but can be very reducer. If You want to know early Aoe school, you will have to study many juyo ones to understand the essence of the school, owning one is not enough, you will have to understand the why of the « den » when the juyo is « den » ko Aoe.ades
Study many good swords in hand is probably the key and not owning several Juyo ones. I doubt my friend Paul Martin owns a single Juyo swords and I am not sure that Darcy even has a Nihonto collection BUT their library is fantastic. Our friend Jussi has chosen Nihonto books rather than collecting books. His knowledge will become encyclopedic if he keeps on studying his books, comparing them, making statistics.
if you take the NBTHK monthly Kantei challenge, one can strike atari without having seen a blade of this school.
I am going to give you an example: more than 15/20 years ago, Darcy posted a Kantei challenge. I was the only one to strike atari, it was a Miike Mitsuyo juyo, I had never seen, a sword of this school but I did the kantei thanks to Robert Cole Sho Shin website.