R.J.
Here's a piece to think about:
Colleges like homeschoolers, and WA is a REALLY easy state to homeschool in. ALL you have to do send a "letter of intent" (here's the link to it http://www.washhomeschool.org/homeschooling/Declaration.pdf) and mail it in 15 days before the beginning of the quarter, and take a test once a year. Not as easy as Tx, but we're a really easy state, overall.
To make things even easier.. this is NOT what we use as homeschoolers, but it's a very good program that your SSD can do completely on her own without any help from dad whatsoever http://www.k12.com/wava/ that's the link to the free curriculum through the state. Of course, you are under NO obligation to use this curriculum (as I said, we don't) but it's an easy thing to try out in the interim while y'all figure things out. ALSO you should know that all highschool students (public, private, or homeschool) can take FREE classes at the community colleges until they turn 18. It's called "Running Start".
So even though your SSD has decided to quit going to her highschool... it doesn't mean she has to quit her education. In fact, she may well find herself already a year or more into her college degree by the time her friends graduate from highschool if she really digs into it. But worst case scenario... she uses k12 (or designs a curriculum herself)... gets her REAL & actual diploma and is set for college at the same time, or even a year after her peers.
Once she starts community college at 18, OR transfers to a university (UW, Western, etc)... she qualifies for school subsidized childcare, special family housing, grants & loans based off of a 2 person family (subtracting whatever her EFC is from her dad and mom), and a whole host of other services.
I started college when my son was 2 months old. 2 classes per quarter. And I can't recommend it highly enough. Yes it's hard going to school with a baby... but not as hard as working full time with a baby. And I, but I was emancipated, "made" more money by going to school than I would have working full time. 4-10 hours a week of class time & studying while the baby slept. Not a super hard life. And childcare for strictly being in class is SO much easier (and less expensive) than arranging childcare for while working.
Anyhow... just a few things to consider.