Hi! First of all, I totally get you, have been in a similar situation, welcome to CC.
Have you done a search? One mom had a very useful topic going on her process with NCP waivers a few months ago (unfortunately an angry dad got it shut down with side arguments). I don’t think the thread was deleted though, so may still be here. It was very specific and helpful.
Beyond that, our own strategy has been to apply to the very tiny number of schools that don’t necessarily require NCP info but do meet need (Vanderbilt, Albright and I hear U Chicago though she didn’t apply), also a handful that give guaranteed full tuition merit for her stats, and then roll the dice with the rest. In our case her NCP did do the CSS paperwork (so far, we’ll see if it gets done with tax forms and all) and his income doesn’t immediately rule out affordability as your NCP’s sounds like it might. I am not doing the waiver process now, since he did the form, so I can’t give you much firsthand advice.
I’ll see if I can find that thread.