you can become EDO JINCHURIKI ONLY IF you have lived as a JINCHURIKI.. when you were ALIVE.
just like the EDO JIN Kabuto allowed Tobi to use..
EDO MADARA wasn't a JINCHURIKI when he was ALIVE.. so he cant become one if he is currently dead..
OBITO isn't dead to he could become a jinchuriki still.. They would have had to REVIVE Madara into the LIVING.
EDO bodies are just dust, clay and stuff <.<
However the JUUBI/BIJUU/ GEDO MAZOU/ ZETSU are all releted ... and MADARA helped birth them <.< sort of ...
Minato put the 9tails chakra inside of his own living body before he died as a possessor of bijuu chakra..
he was revived with EDO TENSEI with BIJUU chakra still inside of him..
He knows all kinds of seals , sensor jutsu, a genius, knows all about the kurama chakra & uzumaki jin seals .. (kushina) so it makes sense I guess for him to be able to harness the yin kurama's chakra like that..
but he doesn't have the same exact style of chakra Naruto has in KCM mode and the symbols or markings are different.. so its not the same.. its a part of it <.<