Since you are willing to spend the money, have a fire alarm, not smoke detectors, but a proper fire alarm.
As for having it notify you, as has been suggested what happens when you miss the call, or are in a bad reception area ?
Then what happens when you call your neighbour and............they have gone out.
If you really want to bush the boat out, have it with confirmed detection, and have it call the fire brigade. (No, i am not joking)
OR
Also as has been suggested, have a domestic sprinkler system installed, and unlike the movies only the one which detects the fire activates, have a look into it, I have seen one fitted in a house, because the owner wanted to, I only knew it was there because I knew what to look for, you only see a small white disc on the ceiling.