Private school? That can cost so much - uniforms, tuition, fees, etc. If for some reason your friend is opposed to public school there are free online public schools, and Arizona has several choices. Just google free online public schools Arizona. Some of the schools provide a laptop, some don't. Some reimburse some of the home internet fees. Private school has got to go.
Time to evaluate everything. Have her (or help her) look at her monthly spending. Meals out? Fast food? HBO and Netflix? Smartphones with high data plans? Car insurance? (Of course, car insurance is necessary but it's amazing what shopping around can dig up). Vet bills and grooming bills for an expensive poodle? Suppers that always include beef, or dessert, or premium ingredients? Pay-per-view or rented online movies? Soda and energy drinks instead of water? Gym memberships, dance classes, acrylic nails, salon visits? Driving the kids to friends' houses where a simple bike ride or even a walk would suffice? Leasing a car or paying for a nice car that could be traded in for a sensible - but way less cool - car? Has she purchased anything that can be returned (hasn't been used)? Is her kitchen full of the latest "as seen on tv" gadgets?
And the kids, especially the two older ones, are old enough to talk honestly to. Have they all sat down and really looked at the cell phone bill? The cable bill? The grocery bill? The bills related to the car?
Does she get an income or alimony?
If she has truly pared down everything, and still can't pay her basic bills (electricity, water, rent, car insurance) and she's driving a basic car, then it sounds like she needs advice from a pro.
If she doesn't get an income and can't work, call everybody - the utilities companies, the orthodontist, people she owes money to, the school staff, and have her ask some frank questions. Am I paying for something I don't need? Is there a way to lower my payments? I actually called Verizon the other day with a simple question, and the person volunteered that one of our lines qualified for a $10 per month discount that we weren't getting. And we found out that our car insurance (we just switched so we are just getting acquainted with all the policy details) included roadside assistance, and so did our cell phone carrier! Obviously we didn't need both, but it wasn't until we asked questions and read the fine print that we realized we were paying for the same coverage twice, so we dropped one. Often, phone and car companies just add on things that aren't necessary, that they just speed-talk their way through, and before you know it you've agreed to pay an extra $40 a month for the privilege of getting a refund if you go six months without an accident. My son knew someone who did this, and the refund was about $25. They were livid, and realized what a scam it is. Is she paying for extra data on phones and not monitoring usage? Is her electric and water usage normal for her family size and house size and area? The companies can tell you.
Having $2000 set aside isn't really going to be helpful if the power is shut off and the water is shut off and the kids get un-enrolled from school.