As a single mom, if there is child support or alimony coming in, how confident are you in your ex's ability to consistently pay? If he loses his job, could you absorb the loss in cash flow? You say you're "newly single", have you lived in your new place long enough to see how much utilities vary seasonally, how frequently the HOA does assessments, etc.? Personally, I would just put it all in an online savings account until I had a year under my belt in my new situation, and then determine how much risk I was willing to take with a portion of the e-fund.