It is really pretty much the luck of the draw as to who you get at Migraciones and what mood they are in that day.
I got the inicial rentista visa in the U.S. At the first renewal the woman didn't like it that I only had an account with the commercial finance house where I brought the money in, legally, to buy an apartment. But ultimately, she said that if I opened an account with a regular bank she would give me the extension, but the coming year I needed to bring in the money through the account. I had a DNI and a CDI so I opened an account at Santander and she gave me the renweal. At the bank, I asked how to fund it from the U.S. The Santander guy said, "It's basically impossible. You need to bring pesos and deposit them." I did that periodically, but not monthly, throughout the year and I got hooked on their online bill pay so when the next renewal came around, I had this bank statement with all kinds of transaction, but none of them was money entering from abroad. When I want back for the next renewal, they asked for the bank statement, I handed it over, and all was fine, I got the renewal in about 10 minutes.