Hi, This is indeed an interesting situation. Here are some things to consider while making your decision.

How proficient are you with your drawing skills? If you are a beginner and just trying to hone your drawing skills, then I would say no. Spend your money on your bills and practice drawing with a pen and pencil. You seem like you may have some experience so...

How proficient are you with photoshop/corel and any other digital editing software? There is a big learning curve here.
if you have a little experience that will help but learning everything these programs have can get frustrating.

On the bright side there is a tutorial for just about anything and if you are confident in your skills, then I say go for it!

That is unless....
You really should use that money for the cancer medicine.