I also questioned the big-a$$ed car Erica was driving. It was a late model, a 2020 and it's possible she either leased or bought it late 2019 before Covid raised its ugly head. You can't really just give back a vehicle without losing lots of money so whether she wanted to keep it or not, she may have been stuck with that vehicle.
As for the plasma donations: I find it very concerning that organizations are allowed to exist that prey on low income people or individuals reeling financially from the shutdowns because of Covid. Giving plasma that often is incredibly dangerous. Without knowing what Erica's days were like and how she compensated for the negative effects that depleted plasma can wreak on the body, her drinking alcohol just upped the danger level exponentially.
If her family want to find out what really happened to their loved one, they should be seeking out information, preferably from the Red Cross or a legitimate medical body to see if there is a way a private organization can be investigated for shady business practices that endanger their volunteers.