Only at massive cost and after clearing the highlands. The Germans were well aware of the altitude limits of the tsetse fly. You could reasonable establish some white enclaves with a total population in the 10's of thousands with incentives. It is just this plan is way to ambitious. I would also like to point out that the Germans ran east Africa on a plantation system much like the old American South. It takes a pretty radical POD to get wide spread white immigration to these areas.
I have started ATL with white population movement to German colonies. It is just what is proposed here is far too ambitious. There will be no 2 million man immigration.
That was just to reach some arbitrary percentage and I never seriously considered it as rational. I opted instead to look at a far more limited area where there was still fertile farmland and highlands which could be used, which brought that figure down to around (210,000). I thought that reachable given time and effort, but then I haven't put extensive research into how the white settler colonies were set up in Africa. As for the plantation system, I imagined that the Poles would be the ones managing many of the plantations that were set up, with native Africans serving as an unskilled labor force to work them. Or do you mean it would not incentivise towns in the like with the plantation system in place?
Also, it is clear how to move white immigration. It is free travel plus economic incentive (land or job). It will not pull by racial group but by economic classes. i.e. The poles moving to German Africa will come from Russia and Austria.
That is what I was aiming at in my earlier posts, and that it would defeat the initial purpose of the program in the first place. It would also remain an open question whether Germany would be willing to take in a slew of Russian or Austro-Hungarian Poles, if possibly some sort of quota system would come in in an effort to promote the movement of German Poles, among other things. But yes, it would not be able to pull Poles exclusively, let alone a single group of Poles.
Also, Kamerun is actually better since West African Sleeping sickness is much less severe than East African Sleeping sickness. I put a lot of the research into the thread below.
I'm aware of the timeline and have indeed read parts of it. And yes I'd argue that Kamerun is better suited for white settlement, but that wouldn't be within the scope of what the OP wanted.
Not necessarily true. Although a massive amount of farms established with the Homestead Acts failed, there was still a lot of more or less viable land open until the Dust Bowl. Incidentally, many farmers most affected by the Dust Bowl were immigrants or their children, including a sizable number of Volga Germans.
Well to expand on what I said, it wasn't that there was no fertile land, but that with what land that was available it was exceedingly difficult to succeed with the limited size of the grant. In certain territories and regions of the States they eventually allowed for much larger grants, sometimes on the order of three to five times the original acreage, to make a plot that was deemed commercially viable. However that wasn't an immediate process, and it also meant more land given to fewer people.