got a croc

[Putnamehere]

i got a caiman off some guy yesterday...he told me he was either gonna kill it or give it to me, so i did what i thought i should have done and i took it. What size enclosure do i need, he is a caiman thats about 3 feet long and his back leg has an ugly scar on it...its pretty much healed but should i still keep an eye on it? I also need to know what i should feed him and what the heat of the basking spot should be. I have room for an enclosure the is 4x4 right now until i move out of my apartment in about 2 weeks...is this to small? This guy already almost bit me haha