What about a designer cat tree in leather, by Rondo? Prices vary, but you can get one for £589.
This one is around £480.
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If you like to know where your pet is at all times, what about a Tractive Real Time Pet Tracker for about £80. You can set an alert on your smartphone, so you will be advised when your pet strays outside the area you have set up as a safe zone.
Maybe a Cat Chesterfield?

Enough to pay in a day perhaps?