I work for a blood bank. Many reasons you are asked to stop donating.
Tattoo, piercings, cold, exposed to blood, traveled out of country, underweight, lived outside the country, donated a short while ago, low iron...
Its crazy. I can't donate for another 3 months because I got exposed at work. Had a unit of blood get punctured and it sprayed me across the face, just like the jokers makeup from the batman movie. Taste of blood isn't horrible, but when its someone elses......
One year deferral.
OP you should be able to make 40 bucks a day working for someone. Ask around.