In short, if ANY Traditional Catholic laymen aren't concerned with
A) the TRADITIONAL TRAINING/knowledge of their priest
and/or
B) the VALIDITY of their priest
and even
C) the spiritual/psychological/emotional HEALTH of their priest
then why not just go back to the Novus Ordo?
When I was in the convent, I met a lot of nuns who had been in other orders, but who were asked to leave simply because "they were too rigid" and "were holier than the Pope."
This so-called "rigidity" was simply an excuse to exclude these religious simply because they were striving to be saints, and yes, these nuns were not imitating the recent popes precisely because of their heretical statements.
I knew many nuns and priests who believed that they had a religious vocation, but who could not find any group in the Novus Ordo who would accept them. Some of these devout religious tried to form new religious orders with other religious who had been dismissed, while others lived with their parents who were aged and cared for them all the while wearing the religious habit and following the rules and constitutions to the best of their ability.
Also some of these nuns left their convents, apparently with the blessing of their superiors to form a more rigid community where the nuns lived in solitude, in huts, like hermits, but who came together for prayers and meals only.
I allowed several of these religious sisters to live with me until they could find suitable housing.
Pray for these religious priests, brothers, and nuns. They are living heroic saintly lives.
If Father Perez accepted Father Norton, then I believe that he was thoroughly investigated and is a valid priest.