You don't need no stinkin' sofa! Put some nice fluffy cushions directly on the floor. Take that futon cushion off the frame and fold it against a wall. Add pillows and blankets. The options are endless!
Wood Profits - This tutorial for a DIY modern couch teaches you how to create a couch with a wood frame and leather cushions that also doubles as a desk. Discover How You Can Start A Woodworking Business From Home Easily in 7 Days With NO Capital Needed!
Instead of filling inside center with cement blocks, put large Tupperware containers with lids in there to store the cushions when not in use or kids toys, or even store bought sticks for roasting marshmallows!
DIY Removable Tailored Daybed Cover & A Favorite Fabric Source