Not to dismiss your uncle's claim... but I agree with propofol, the numbers are slightly off.

250K with only consulting is tough to pull off. However, Gleneagles has a unique difference in that the clinics are privately owned. So he may be earning on the dispensing of medications as well. Also, depending on speciality, there may be clinic based minor outpatient procedures that he is doing as well.

That would make 200K possible on a 25 day month. Its still quite a stretch though...