Every Thanksgiving the entire family goes to our condo in Naples. That's 6 adults and 4 children in a 3 bedroom unit. As you can imagine the sleeping arrangements are challenging. Each of the two guest bedrooms has a queen size bed and we were adding a queen size inflatable mattress for the kids. It made things very tight in both rooms.
We determined that the solution was to go up rather than out so we got two sets of bunk beds which fit very nicely. The grand kids are very excited about them.
Here's a picture.