It is good idea and good hearted work.
But, can you find as many speakers as possible to handle the radio programmes for the immigrants?
Why not push Esperanto as the world language, everyone learns in 150 hours and they can communicate with everyone.
This is the problem of the people, they are either uninformed of or they are reluctant to believe Esperanto as they are poisoned by many articles online.
Just think with your head but not the feet.
Esperanto is recommended by UNESCO and the NGOs in the world are what a shame you are not respecting the UNESCO resolutions 1985 to use Esperanto. Read the resolutions here.
Shizuyo Yoshitomi started a radio station to help immigrants