A hypothetical case, An Earth like, life supporting planet is found just 10 Lyrs from Earth. If money was no object, how long would it be before the first settlers arrived at the new Earth?
10 liytyears... And the will political and economical to reach it. To get a couple of tons to the star in a around a 100 years trilions to stop at the system... proberly impossible... Ask again in 50 years when there is more knowledge on antimatter and exotic matter.