#1 If im in real world, I'll take the 1 million dollar. It will be suspicious, but hiding money is easer than hiding a person.
Taking care of super-beauty Elf in real world is a burden, there's lots of evil people that will assassinate me and kidnap her due to her beauty.
#2 If I'm in the other world, I'll take the elf. She might guide me around and help me adapt, hopefully elf isn't hated by society there. It would be dreamlike if she has high position, but hopefully me as human isn't hated in elf society.
1 million dollar is a useless currency in otherworld, it's just stack of small paper that Can only be used as a wall decoration. It even has less value than A4 paper, as you can't use paper money for writing effectively.
I'll take a stack of A4 paper anytime over a million dollar if I'm in the otherworld.