~~ Topic moved from K1 forum to AOS K1 as this is the AOS stage ~~
That should be fine
https://www.uscis.gov/i-864p
125% one for household of 2
keep in mind that it’s preferred you make well over that amount as 24k is very little, especially if you live in an expensive state/city
This should have been done as soon as she arrived in the US, even before marriage or AOS application. K1s have 75 days out of 90 days to apply for one. Unfortunately, it is too late now. You will have to wait until she received either an EAD or GC.