It all depends on how you want to live here. If you eat out, spend weekends in hotels, make lots of phone calls and stream and download lots of things on the internet, have expansive tastes in clothes and shoes - no, but if you cook for yourself and live more like a Ghanaian you should be able to manage very comfortably on $1000.
Most Ghanaians would jump at the chance to earn that amount of money per month and have their accommodation etc paid for