If you can make a good wage for several years before you apply, SSDI will go up and won’t be such a low average. Unfortunately, I was disabled after only a few years in the workforce and the most I made, even with a degree, was $15/hr. I wasn’t making enough for long enough to get more than the $914 (the SSI limit). That’s the best advice I can give. If you get SSDI, you’re also allowed to get married without losing benefits. Those on SSI, if married, the income the spouse makes is considered your income and is taken out of your SSI.