Please I want to own my dog. This will be my first time of owning a dog.
I saw A Bullmastiff and I feel like buying it.

My question are;
Is this breed a good one for a first timer
What are the peculiar problems associated with this breed
Are they loyal dogs
Are they kids friendly

What are the requirements I need to put in place for the arrival of this dog
I don't want to use it as a pet. I want it to be as a guard dog

How do I manage this dog from this infancy to avoid death.
What is the average range of cost price for this dog?

Thank you.