Of course you don't have to live in Windsor or Kew. There are many areas North and east of LHR where you can get a decent 3 bed semi for 120K or a 4 bed detached for 200K and have a commute of only 70 mins or less.
The call out time on Stby is 120 mins so that gives quite a large radius in which to find somewhere suitable. With the recruitment rate at the moment you won't be on the bottom of the 320 list for long so will be able to bid for tours. This will reduce commutes to 5-6 a month.