@Kyle Fadness
I'm no expert, but according to every BP podcast I've listened to: Anytime you can't attract tenants, drop the price. It seems you've eaten 6mo of mortgage by yourself. You can always try to raise the price once the next tenant leaves. Even if you are a bleeding a little bit of cash every month by doing dropping the rent, it would still be less than a vacant property.
Also, as I have heard other people say already, don't say you are the landlord.
I don't believe the decision to sell is as simple as not getting the cashflow you initially suggested, so you should sell. Rents tend to go up over the long-term and so do prices (conditions apply). If you are in an area with favorable population growth then it is reasonable to assume appeciation of ~3% (2% for inflation + 1%) or more annually. It is also reasonable to assume that your rents will go up about 3% a year.
If you factor in principal paydown and that 3% reasonable appreciation in rent and property value would you still see a positive gain to your net worth over time? That is how I would look at it personally, but maybe I am just biased because I live in CA where it often is a requirement to take more factors than just cashflow into account when making investment decisions.