Khartoum has heaps of longhaul demand. There are plenty of DC-10s or L1011s on the market, you can grab 2 with your initial cash, and expand to 7 as money comes in.
A very quick look says DMK, SIN, ICN & PVG all have 300+ pax daily demand, and are easily in reach of any DC10-30. So stick the first 4 planes 6 times a week to each of those. Then LHR & JNB are both empty, and can support a shorter DC10 flight. That'll give you enough for a 7 day schedule for 7 DC-10s, maybe with a short flight to the middle east in there too, and you will be making plenty of money to finance expansion for more DC10s on more marginal/competitive routes, smaller planes like CRJ or 737 for the <1500 nm routes, and eventually upgrading the DC10s to more modern planes.
You're also wasting money on staff and marketing at the moment, because you fly to 14 destinations. 8 are once a day, and 4 of those can easily support 2 a day. If you dump the routes to SHJ, ADB, CAI, AUH, and put a 2nd flight a day to DXB, HRG, KWI, RUH instead, you're only flying to 10 destinations, which means less overhead.
Starting a successful airline in Khartoum at the moment shouldn't be tough. If I didn't have grand plans for Sydney, I'd be tempted to restart there & prove it.