Open Question: How to get health insurance as a nanny in Massachusetts?

Right now I work as a toddler teacher, but in September I might start working as a Nanny. I have no idea how to go about getting health insurance for myself without it costing a ridiculous amount! Even if I go through a nanny agency, they are not responsible for finding me insurance, since I would be employed by the family, not the agency. Everyone is required to have health insurance in Massachusetts, so it's not really an option not to have it. Any advice would be greatly appreciated, since the health insurance is the only issue stopping me from telling the family yes right now!! Thanks in advance!