Ok, I checked with the government of Scotland about using the NHS or not, even with the required CSI. This is their response:
"Comprehensive Sickness Insurance is a requirement under European legislation: Directive 2004/38/EC. However, state healthcare in Scotland, the National Health Service (NHS), is funded from general taxation and is a residency based system. Therefore a person’s right to receive NHS treatment and services at no charge is determined by their legal right to be in the country; their reason(s) to be here; and the length of their stay.
As you are exercising an EU treaty right to take up residency in Scotland...there is nothing to prevent you both from registering with a general practitioner (GP) to receive NHS primary medical services at no charge, although registration decisions are for GP practices. It is the GP that would refer you to hospital or specialist NHS services if that was necessary - again, based on the information you have provided, such treatment would be provided at no charge.
When registering with a GP the practice will wish to see proof that you are an EEA national; for you to confirm that you are exercising your EU treaty right to reside in Scotland; to see your daughter’s EEA Family Permit...."
So that answers one of my burning questions.
And unfortunately, GeoBlue doesn't meet ACA standards. But if she's not working, she's exempt from it anyway. So.... Several companies in the UK that I contacted won't discuss cover until we live there. One says she'd have to have lived in the UK and been assigned to a GP for at least a year before they'd discuss cover. At least I'm weeding 'em out!