I have read that most colleges offer health insurance plans for currently enrolled students -- some offer family plans, if needed. You need not be full time, either -- just taking one course qualifies you. (Just auditing a course might work -- the nice thing about auditing is that it is often quite a bit cheaper and there is no grading -- you are paying to be able to attend the class, how much of the work you actually want to do is entirely up to you.) Depending upon the college, the savings over buying on the ACA open market may be substantial.
Sometimes you really have to look around on the website to find the rates -- you might be better off inquiring directly with the college to get this info.
Plus the best part is, you should be able to find _something_ that you are interested in.