I went looking for how many people died from unlicensed medical treatment and found this gem.
http://lasvegassun.com/news/2011/apr/10/2-nabbed-mccarran-accused-womans-death-after-botch/
Every year in Tampa several people die from silicon injections for lips, buttock and the penis. From some of the articles it appears that the person committing the fraud uses silicone from a commercial source like Lowes.
Sounds like someone who wasn’t even a doc, like the folks that do ear piercing, etc..
Used, mobile, MRIs are out there for as low as 70k.
http://www.medwow.com/used-mobile-mri-equipment/764.med
If radiology is not your thing, with a microscope, slides, a speculum, and those long q-tips, you could roll into the local barrio and do $5 pap smears.