To be a professional Aikido teacher is to make sacrifices, to make Aikido one's highest priority, to dedicate one's self to the art, to subscribe to the Aikido philosophy. I think that Aikido schools have a function similar to that of monasteries, and that Aikido teachers are like monks or ministers. In their efforts, O-Sensei and Doshu had uchi deshi to help them. When a teacher of that level sets up a program for live-in students, it would be a joke to call it an uchi deshi program. Setting up an uchi deshi system today in the US would be very difficult, if not impossible.
American culture is different from Japanese culture.
So, the system would have to be different. As I have said, the old system does not now make economic sense. Also, people now have a different mentality. Those concepts come from a very different culture. And students today don't have the patience or dedication.