Cheap Sofas

I’m about to move house and it’s quite a small room, my girlfriend stays round so I need a double bed.
I have been thinking of ways to spend little and have a good looking bed, whilst saving space.

http://www.ikea.com/gb/en/catalog/products/60109912/?cid=en%3Epc%3Ego%3Eproducts_search

I was thinking a base like that without a frame would be okay, but concearned it may suffer without a frame?

Also thought of this http://www.made.com/collection/epure-collection/yoko-sofa-bed-willow-grey

but its kind of pricey and i’m on a student budget.

Any ideas for a space saving large, cheap bed?

A tall order I know

THANKS !

A platform bed would look cool to your girlfriend, nightstand and lamp and clock beside it. You can build a platform. Cover it up w/ a bedskirt, nobody has to know. Follow the link->