As you might guess, sleeper sofas can be heavy. For example, the San Diego 77” Square Arm Sleeper Sofa weighs in at a little over 101 pounds. The good news is that your friend the football player is probably going to be comfortable on this sofa. It has a pop-up seat, plus a fold-down back and is rated for up to 750 pounds. It might be a good idea to have the sofa delivered or to have your friend help set it up.
Futon sleepers and twin-size chair sleepers tend to be a little lighter and might be manageable by a single person or a couple. Still, it is always nice to have a little help when it comes to large furniture selections.
Measure the doors before delivery. Patio doors are often a good choice for bringing home a big furniture item. If you live in an apartment, think about stairs, doorway sizes, and whether or not there is a freight elevator for large items.