Hi there
I am sorry to tell you that you will not get far on that salary in Lubumbashi, unless you can find shared accommodation and live on just basic food essentials. Because of the Mining industry and large expat community, prices are sky high. The climate is good with a long rainy season that will end by March/April. Then it gets a bit cold till September. September to December is VERY hot and dry. Then the rainy season starts again. Malaria, cholera, bilharzia and other water born diseases are common. If you need more specific information, you are welcome to contact me directly
Good luck!