Advice for Job Offer

[ahouston]

RN looking for some advice on a job offer. 
I currently work in Home Health using my own vehicle working in my local county with a pretty flexible schedule, reimbursed a certain amount of my mileage, most weekends off, rotating call about every 6 weeks, and finish my charting at home usually late at night after everything settles for the day. 
I was offered a school nurse position (small school, slow job) that would be a substantial pay decrease about $9hr with pros to flexibility with my 2 kids (13 and 15) as I would be on their schedule, paid insurance, pension, paid year round and summers off work. 
Taking this job scares me for the pay decrease as I am a single mother. I know I could work PRN somewhere else on my off school schedule to make up some of the difference.
Any advice?? 
 Background: I was an LPN before getting my RN. I have worked in clinics, urgent care, hospital, HH, and a short time in long term care