Re: 2000 quid?
You seem stunningly ignorant about iPads, ever used one ?
Single threaded performance of the latest Apple chips is indeed equal to or better than a mid-range Intel laptop chip with a typically lower power draw.
As for old iPads, my original Retina iPad is still going fine, at 6.5 years. Battery is fine, display is still good, and it works. Can't use latest iOS, but the version it has is quite OK.