Apologies for the long post.
My brother and I (EEU nationals) have both acquired PR cards as workers - his qualifying period was 2013-2018, my qualifying period was 2010-2015.
Our mother (in her 70s, EEU national, no income, no comprehensive sickness insurance, living off her savings and financial support from me and my brother) arrived in the UK in 2012.
My mother lived with me during 2012-2017, and in 2018 has moved in with my brother.
We are going to send in her paper PR application as dependant of an EEA national - given we think she's not eligible to acquire PR through the self-sufficiency route as she has no comprehensive sickness insurance.
We know she could also wait for the Settled Status route to come in in 2019, which would presumably be an easier application as she'd only need to prove residency rather than residency + relationship + dependency.
If we go ahead now with the EEA (PR) application as a dependent:
To prove dependency, we have her current account bank statements (originals) showing money transfers both from me and my brother.
To prove residency, we have her credit card statements (originals) - I am trying to get council to send past council tax bills with her and my name on them to strengthen the residency proof for when she lived with me during her qualifying years of 2012-2017, but it's proving impossible as they were issued only in my name originally.
To prove relationship, we have my translated birth certificate and my brother's translated birth certificate.
My questions are:
1) Is it best to send my mum's PR application with my brother as her sponsor, as she's now living with him - or is it best to send my mum's PR application with me as her sponsor, as she was living with me during her 2012-2017 qualifying period;
2) Regardless of who her sponsor is, do we send both our PR cards to support her application - as she was basically dependent on both of us?;
3) Are her bank statements showing money transfers from me and my brother enough to prove "dependency or household membership"?;
4) Are her credit card statements enough to prove "residency" during the qualifying period? She has no utility bills, council tax bills, or NHS letters.
Thank you in advance!