Does your daughter need health insurance? Are you applying for Marketplace insurance for her as part of your policy?
As Carl and Daniel pointed out, I suspect the tax benefits of claiming her will FAR outweigh the extra cost for health insurance.
If you ask your daughter to reduce her hours at work so that she only has $6300 or less of income in 2017, you will NOT need to add her income AT ALL, even if you claim her as a dependent.
