@Benjamin Sykes Your numbers sound good if they're accurate and I like how you're thinking about the location and the trend, but you still want to know what it'll be like to operate right now.
The best advice you'll get on how it'll be to operate that property today as-is will come from calling a local property manager or two that work in that area. If PMs won't manage it, you'll get an idea of what you're in for.
Keep in mind: it's not just about income of the residents in the area. Most likely you want to provide a safe place for tenants and the people who maintain and repair the building. I just talked to a PM yesterday about two properties in one city here in Texas. One she was open to managing, and one she wasn't because she knew there was a lot of violent crime. The crime stats are terrible there and she herself had seen at least one shooting. For her, it was a liability issue keeping maintenance people safe. Hopefully this isn't the kind of neighborhood you're looking at, but if you're still not sure, you can also call the non-emergency number or visit the local police station. If it's a major problem area, the police will know the street and some of the buildings and tell you about them.
One final thing: M2M is appropriate for very low-income, high-vacancy areas, but the churn of these tenants is a much bigger hassle than operating on longer leases in a more stable neighborhood. A lot of PMs won't be willing to do it. It's another reason to call the PMs.
Good luck.