You can base anywhere and still make profits in this game; to have to be in areas where you have a high airport density within 600 miles of your base isn't a factor in why you are failing.
You need to pick aircraft wisely and also check when their C & D checks are due; all my aircraft I have leased I have made sure that C checks were at least 7 or 8 months away but most (99%) have 11 months from lease before their C Checks are to come around and D Checks are again 99% in 7 or 8 years time (I only have one due before that in 3 years but by then that aircraft will be retired from my operation). Doing this helps give you time to build up a money reserve and also expand your airline.
The 737-200adv whilst cheap on the market are old so when C checks are due they can take a nice chunk out of your profits they are also not are eco freindly as newer models so can burn more fuel but they do have cheaper leases.
As for Africa the demand isnt great (as in real life) unless you base at airports like Tripoli, Cairo etc where there is good tourism demand, so again picking an airport you need to choose carefully. The A330 is good but then again depaends on route types you are operating it on you need to make sure you can fly it on a route 7 days a week to make money out of it so maybe to start chose a route with sufficient demand to sutain the number of seats it has but is within 3500-3800 miles to get best utilisation out of it to begin with and once you have 7 of them then begin to do a 7 day scheduling system on the routes, that way you utilise them more and make much better money. The CRJ's are good but the smallest I would ever go for is the CRJ700 anything smaller and you profits wont be great (in which case go for the Q400 which is awsome upto about 900NM from my experience)
Look I'm playing since 2 years and...
You cannot base anywhere and make profit! when I used to operate from Milan I did grow large! starting with an old fleet of Fokker and BAE.
Second i used my Airbus on a daily flight linking Mauritius to Dubai full load factor and the same for the other two routes I had I know that if I would start with 3 flight a week with longer routes it would compromise even more.
Third CRJ attem they did confirm in others post that handling/pax fees and staff cost will be changed and upgrade, as far I know the number of staff is plane based and not passenger for example on the CRJ you work with only 1 flight attended on average but I had enough crew to run an Airbus instead of CRJ200 problem that make the used of those aircraft not profitable!
Last of course I'm not going to lease aircraft with C check coming in the next 2 months most of mine were do in 10 and more months no one of my plane is on C check at the moment but I'm -1million
Than how I can pick up different Aircraft if there no one? running almost new CRJ does not work so what should I do?
Africa got less load factor ok but not so low take the capital of RD Congo Kinshasa average number of pass per destination less than 80 plus link between Kinshasa and Paris or Bruxelles are way low in passengers despite the real world.
I'm operating flight between Tel Aviv and Khartoum with 200 daily passenger is there a real link wondering? of course not you need 3 stop to reach there
when if I want to fly to Adis or Nairobi less than 100 pass daily this is only one example.
however I have proper LF avarage 160 or even more pass daily but from airports 1000+ miles less lucrative