They are paying between N$ 5 000 and N$ 9 000 depending on the season. That's 500 to 900 euros a month.
as flying bigger planes - try Gaberone Botswana, there's one operator there, but he wants 5000 hours.
Other than that, there's only one here in Namibia, and they want you to have flown with them for 3 years before you can fly their twins.