So here's where things stand

a) I've pretty much given up on the puppy thing

b) If I got a dog (ie adult) it would stay home when there was someone to take care of it, like my husband and/or neighbors

c) I don't see needing to take it to classes, I've trained several adult dogs for advanced obedience and am well grounded in behavioural techniques, I would do the training in the evenings or when I have time during the day.

d) at times when there was no one to help at home the dog would go to a sitter or come with me to work (I don't work at a gym, I work at a PT clinc but we have a gym area with lots of room where I could keep the dog during working hours while I am with clients, between clients or while doing paper work the dog could hang out directly with me in my office.)

e) part of the reason I'm choosing a bullmastiff is that they tend to sleep anywhere from 10 to 18 hours per day, have low exercise and grooming needs.

f) bullmastiffs can have aggression issues - especially with other dogs, I'm aware of this (I have owned one before that had some issues) and am willing to take the necessary precautions should something like this arise.

Am I still missing something?