I suggest a mix using coconut husk chips (CHCs). They were intentionaly for orchids, but experiments conducted by some citrus proffesionals has proved it's great for them to!
CHCs drain super fast. Yes, although they don't like wet feet, they like their water. CHCs absorb up to 7 times their weight in water. Just waited all winter for
spring to repot and make the swith for mine, they are loving it!!!
(I have a mix of mostly CHCs, sand, and normal potting mix, in decreasing quantities).
For the pot, it all depends on the size
plant you get....as for made out of what, I have a meyer in the black plastic pot from the nursery and my calamondin in a terra cotta pot. Both are great. I water the Cal more often cause of the terra cotta pot though, and of course it's heavier, something to keep in mind if you will be moving it in and out alot if it's a bigger
plant then mine (2' tall, 1' wide).
: )