Your welcomeThank you for getting back @lignumvitae
I was wondering, why do you think that it's a not a good idea to open a USD account? As far as I think, it's better to do so to remain immune from volatile local currency.
Regarding the trail, would it not confuse the VO with 2 docs related to the source of funds?
US dollar account might not be a good idea because; if your brother is gifting you the amount then go ahead but if somehow you have to return it to him one day then you might see a draw back.
Why would it confuse the VO? When you would provide a clear description regarding the POF in your LOE. Multiple documents combined in one pdf with size of less than 4 MB is a facility CIC has provided us with. And it is our right to avail it in whatever legitimate way we can.