It won't work with that type of attitude. You fail to realize that some of the same guys who benefited from such kindness and understanding from their teachers would also do the same for their students, understanding what it was like to not be able to pay full price.
But the more I read your comments, The more I begin to think that you are right. It won't work for YOU. Just from what you said in the post. I would teach a student for free or reduced cost but not if they have the same attitude that I'm picking up on you.
Sometimes Younger People should just listen to those who are Older and who have been through some of the same stuff you now have trouble with.