Thanks for your advice - do you think if I expand it to say 40 or 50 pages and proof read it that it might sell?

Yes, on the whole clearly and powerfully written, i picked up one english error: you can get by without a bet
Here you mean 'Can't'
But I feel for you man, you have done amazingly, and you come through as honest and sincere-plus great advice!
Thumbs up from me-for what it is worth!
Cheers