instead of lino, to keep the floor warm and save yourself a buttload of money, go to any carpet store, pick out some of their leftover stock (usually $100-$300 for a 12'X12' piece) and some cheap underlay ($50-$100) and install carpet in the room...that way you can keep the floor warm...
the reason i'm trying to steer you away from laminate is that for a temporary flooring solution, it's kind of a waste of money if you're just going to be tearing up and tossing in the near future...
but if you're absolutely set on laminate, i'll check my shop and see if i have any extra stock kicking around that will fit your room size and save you some cash...PM me exact dimensions and i'll see what i can do...