This may be controversial, but I’m just throwing it out there in case people are unaware…but I personally know people in Texas and Louisiana who are earning quite a bit of cash from regularly donating plasma.
Several people were doing it once a week to pay down debt more quickly. Of course it also helps the people who need the platelets, which morally should be the real reason one does it.
This is definitely not something everyone would be able to do, but it is an option you may not be aware of.