Here is another set of dumbbells that replace multiple weights to save you some space. The Ativafit 66lb Adjustable Dumbbell replaces 12 weights. It has a Dialtech design that lets you change weights fast. This set has 2 x 66lbs dumbbells. Their weight can be adjusted in 5lb increments from 11lb.
These dumbbells have a non-slip handle with a honeycomb structure. You can change weight by holding the lock button, rotating to your desired weight, and releasing the lock button.