If you are taking some time off you may qualify for an hourly pay (within limits) through IHSS (In Home Supportive Services). They actually pay for stuff like doing laundry, shopping, errands, etc. and spouses are eligible. In CA, it is administered through the county welfare system. The American Cancer Society will also pay a mileage fee if your round trip is over 60 miles to and from the treatment center.

He's probably too young for SSDI but he might qualify for SDI. Check the SSI website for qualifications/eligibility and documentation requirements. SSDI and SDI are retroactive from the date of disability as a rule.

Ask for copies of all medical records and lab reports. You don't need actual scans but the scan reports are very helpful. You will also need a certified copy of his birth certificate for any federal claims.

I was disabled for almost 2 years and was in very good health going into it.

It's good that they are hitting this aggressively as his young age actually works against him a little bit.