The Vonanda sofa bed on Amazon can be used as an ottoman for ... This Coleman cot/air mattress combo, $199.99 at Walmart, is heavy-duty and has a strong steel frame that supports 600 pounds.

Sleeper sofas come in a range of sizes, from loveseats or chairs-and-a-half that convert into twin-sized beds and full-sized sofas that contain queen- or king-sized mattresses. Like buying a sofa ...