One option we thought of was to relocate to our home country near our family but did not because of good treatment available in US. But this is certainly something to think though for future.
If this is something under serious consideration, it's worth a consulation with a subject matter expert and not just random internet people. Also, divorce may affect immigration status, which seems to be in play as well; and it may make visitation more difficult, although you might just not tell medical facilities about the divorce.
That's a brutal suggestion even if your intentions were good!
OP should talk to an attorney familiar with creditor and estate law.
(If you read "may want to divorce to avoid their medical bills" as "you should break up with them", I don't think you interpreted the suggestion correctly.)
Thoughts in order from most to least palatable:
1. Try your best to lean on friends and family if possible, nothing else will help you reclaim as much time. Don't be afraid to get aggressive here, you guys are struggling, let people know.
2. Ask yourself if you can invest in hiring help around the house: cleaning, cooking, laundry, etc. If this buys the time to get a much better paying job, it can be well worth it.
3. Consider a lower standard of care for your partner while you prep. This is a hard option, a mutual sacrifice for the future.
4. Staying the course may not be so bad. If you're married to your partner you may want to divorce to avoid their medical bills if there's a chance they don't make it.
5. If the disease is not very treatable, consider instead enjoying your time together rather than spending money on treatment (my own experiences with this problem and this article shaped my ideas: https://www.zocalopublicsquare.org/2011/11/30/how-doctors-di...)