The twin bed in @L14cpr's guest room seamlessly ... space for someone who is popping by for a bit? Checkout the IKEA UTÅKER bed. It's a sofa, it's a daybed, it's a king-sized sleeper ...

I slept on the same garage-sale-purchased twin mattress through senior year ... to get this 110-pound mattress up onto my (IKEA) bed frame. For the installment, I’d recommend an, at least ...