Have they asked for PPR plus Medical or just Medical + re-pcc?
You can get the Re-pcc done in her abscence, they just stamp it as (applicant not present which does not make a difference anyways
check the DMP list in Canada to see where you can get the remedical Done
I hope they are not asking for proof of relationship that would be a joke after granting visitor's visa to her.
Regarding sending passport he stated that he sent it by Fedex to his inlaws who submitted to CHC and then one of his contacts brought it back to Canada by hand and then he just crossed the USA border got herself deported and entered Canada to get landing documents
What is your AOR please?