The solution, measure the space you intend to use before buying, and look at the specification of the Equipment and allow at least six feet extra on all sides.
Here are examples of size differences.
This piece of home Gym Equipment is small, and will fit in most spaces, all you would need is space to store it and workout.

The Home Gym is an example of a narrow but tall Home Gym.

and this one is an example of Home Gym Equipment that is both tall and wide, but still compact enough for a small room.

This is the Home Gym Equipment that needs a Lot of room, as it uses free weights.
