Wellcome to the forum.
Just a couple of questions on your situation.
You say your DW will be getting SSI. Did you really mean SSI, or normal SS? SSI is a state program (funded by the feds) for disabled folks who never worked, but depending on state has strict qualifications on how much you can really have in assets (most states have a $2K limit - indivudial, $3k - couple). Here's an SSI info SSI link:
Also, if you don't know already, your claim for SSD (Social Security Disability) may/may not be processed quickly, due to the review process and you may be without SSD income (it's backdated to your application date, even if approved month/years later) and even though you will be qualified for early Medicare benefits (don't know how this will work with your former employment's benefits, or amount of coverage) but there is a 24-month waiting period after your SSD is approved.
Anyway, good luck on/with your upcoming challanges for both you/DW...