10-14 days is not long enough to collect all the animals you have listed unless all you do is shoot and forget about hunting.

If you're going to Namibia take only animals that are native to there. Forget the Black Wildebeast and other Game Ranch species.

In Namibia: Kudu, Gemsbok, Red Hartebeast, Mt. Zebra, Damara Dik Dik, Klipspringer, Sprinbok, Impala. If you can get one of each you've done well. Try to get them all in a Free Range State not a High Fence. They are all available both ways but their natural habitat is different so by taking all in Ranch Hunt you are taking animals that would not normally be there.

Mt Zebra is my favorite, much like Sheep Hunting only a wee bit warmer.

Next is Red Hartebeast. Not because they are prettier but because of the difficulty of a stalk on a nice one in the country the live in and the size of the herds they travel with. Kudu and Gemsbok third unless the Gemsbok are in the Kalihari or the Namib Deserts. Than Gemsbok are second. Klipspringer at the same time and area as Mt. Zebra. Springbok are everywhere, Impala in the North. Damara Dik Dik are in the North and very tiny.

If you do it where they are the time is gone.