Crib or pack n' play?

Question ladies..

So I'm going to be a single mother come April.. right now I live in a 1 bedroom apartment (I'm due in April, lease isn't up till June) so therefore baby will be sharing a room with me. My bedroom is big enough for a crib but it would take up a lot of room.

So my question is how necessary is a baby crib at first? Or will a pack n' play or bassist work?

I'm trying to buy the big things now or put them on my registry and I'm just curious of which would work better? Or which you ladies would recommend?