Virginpax makes some valid points - I don't think anyone is under any illusion about the challenges.
On the other hand - if you don't need to get back and forth between London and Cumbria - you may underestimate just how difficult that journey is.
Despite upgrade works that have been going on for (what seems like) decades, the weekend train service is a joke. An air service to (any) London airport would be a leap forward.