Being chained in the back yard with a hut and water is not proper housing. Dogs are social animals and pets really should be part of the family pack. If you cannot make a dog a family member, keep him safely inside when you are not home and let him have plenty of exercise in a safely fenced area, reconsider. It is cruel to a dog to leave him outside all the time. Also, these dogs are more prone to become nuisance barkers and victims of pranks or theft.
Some breeds require a lot of exercise daily both physical and mental.
The half hour walk given to a Bulldog is far from adequate for a Border Collie. A Bulldog will not be able to handle the strenuous hours of daily workouts a Border Collie requires. Research any breed thoroughly before getting use several different sources as well. What one person or even a vet says about a breed may be totally erroneous. If you are looking at a cross, research the breeds you know are in the cross to give you an idea of what you are getting.