What is a good idea for a smaller bed of some sort for my bedroom?

sofa beds great this, can cool ones super comfy, or can super cheap ones... iv got super cheap one, they're not great, it's decent, plus, makes great place sit whilst playing ps!
1 of fold bed things, it's length of mattress folds cube/ tiny chair. don't remember they're called, they're more comfy sofa bed got (although sofa ned 1 of cheapest)
before had sofa bed, used lay spare quilt house on floor. never complained.

i have friends on time , i'd have place them sleep. sadly, bed takes bit of room in bedroom , want give them sleep on that's not floor. help(:

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