Wow! Thanks everyone for you input. Talk about bursting my bubble.. seriously I really appreciate all your views, even you 'grass strip basher'.
In terms of what I think the reality is, I will probably take the middle ground here as somewhere near the truth. On the positive side I have had one of the flight schools here telling me that the worse case scenario would be that I could earn 6k a month as an instructor and of course on the negative but probably realistic side I have had all of your comments.
It has certainly been a reality check to ask you guys your views. I value the feedback from 'corsair' on my age being a factor in my ability to learn as quick as the kids.
So the dream is over but I will go and do my PPL and medical and just enjoy it
Thanks again folks and happy flying.