Side note of interest, from Wikipedia: "Flying Machines Which Do Not Fly" is an editorial published in the New York Times on October 9, 1903. The article incorrectly predicted it would take one to ten million years for humanity to develop an operating flying machine.
It was only six years to go from the first multi-person spacecraft and first spacewalk to the first space station.
Yeah that's my entire point, technological process doesn't have a constant rate of acceleration. Some advances are quickly made one after another and others lag and take a very long time.
Even if technological progress stopped we could have launched enough parts to assemble a colony structure.