You need to have a spare bedroom, time, patience, tolerance, and energy. You must be able to share your home and life with others.
Short Break Care involves working together with a team of people to care for a child/young person with a disability. It is not something that can be done in isolation, it affects your family and close friends.
If you have children of your own think carefully about how they will cope with sharing you, their home and their possessions. If you have a partner, Short Breaks is something you must both want.