[Milo]

The insurance is no biggie. Adderall is not that expensive, the problem is that you don't say why you are too skinny, but one of the side effects is appetite suppression, which can't be good for you. Adderall is essentially a timed release amphetamine (speed) in a controlled dosage. While it will certainly help you focus and will likely earn you more $$, it is also a really -EV in the long run.

EDIT: ACK!! I just read your post more thoroughly, you may have a serious weight problem. Bite the bullet, pay the $$ and go see a doctor. At your weight, using Adderall could be potentially life threatening.

Additionally, it may be +EV in the long run to reconsider your job choices. Almost any "day job" will come with insurance, and if you have medical problems, you need insurance. One or two hospitalizations could bankrupt almost anyone.

Note: I am not an MD, but am a clinical psychologist (Ph.D.) so I'm not talking out my ass here.