Guys, I have thought many students of all ages (one lady of 70plus). I realise that students are all different and learn at different paces. No I am not too "big" to teach somebody who is going to take a lot of TLC.
What I am saying is that there are some people who just will not be able to do it for whatever reason (most likely a funadmental problem which may be medically related / NPPL medical standards are minimal).
99% of people will get with enough time, money and determination HOWEVER there are a very small number who won't pass muster and who would be bloody dangerous to themselves and others if let loose in an aircraft.
These people know themselves that they have a problem and will readily admit that if you are open and honest with them and have tried hard and exhausted all possible avenues. You guy's are obviously not in that category.