As I mention, financial hardship is not the best way to apply for a hardship discharge.
But care for a parent who is in need of care would be.
If you look at the AFI that covers this (you can see it here http://static.e-publishing.af.mil/production/1/af_a1/publication/afi36-3208/afi36-3208.pdf
) you see it says
3.20. Conditions for Discharge. Airmen may request discharge when genuine dependency or
undue hardship exists.
3.20.1. A basis for discharge may exist when:
188.8.131.52. The dependency or hardship is not temporary.
184.108.40.206. Conditions have arisen or have been aggravated to an excessive degree since
the airman entered active duty.
220.127.116.11. The airman has made every reasonable effort to remedy the situation.
will eliminate or materially alleviate the conditions.
18.104.22.168. There are no means of alleviation readily available other than the separation.
3.20.2. Undue hardship or dependency does not necessarily exist because:
22.214.171.124. Of altered present or expected income; or
126.96.36.199. The family is separated or must suffer the inconveniences usually incident to
You can see from above,
Undue hardship or dependency does not necessarily exist because of altered present or expected income
It is real tough to get a request based on income approved.
A better approach is if you can show medical hardship.
The key is to demonstrate that this is not temporary, and that you being with your mom will "eliminate or materially alleviate the conditions"
So you would want to convince the doctor (your mom's treating physician) to draft a letter that describes her condition, that it is not temporary, and your mom needs your presence. Specifically, that your presence will eliminate or materially alleviate symptoms of her cancer.
If you can get a letter like this? You have a reasonable chance to get the request approved.
Take a look at the AFI (link above)...there is information that discusses the application process. It starts on pg 53.
You can certainly mention the financial hardship as an additional basis...but I would focus on the need for your help with the cancer therapy.
Let me know if you have more questions...happy to help if I can