Understanding Fails

So my IG is to have two mortgages amd a HELOC paid in full ( total 880K) by December 31, 2019. The end goal delights me to no end for all other goals can be satisfied if/when this happens. I stay at home and care for my aging parents so an income on my part seems unlikely. I am passionate about being a stay at home mother and parent caregiver so i know this is the right “job” for me at this time. My questions all surround the “Fails” i dont know what they should look like or sound like. To i say My husband would get a raise, I’ll squeeze budget to add more to mortgage? I’ll shop at Goodwill for kids clothes? I’ll expect a windfall? I know once i figure out the right path with this ill have an AHA moment and go for it.

Thank you