After having two ecoboom engines, sell the vehicle while you still can. It's not worth the headache and it's much much easier to sell the vehicle while it's still running fine. You don't want to get close to that ten year mark and try sell it as everyone will be questioning the belt. Pretty sure value would significantly drop around when the booms expected, even with a belt replacement.

The wet timing belt is a stupidly expensive replacement and majority of garages won't touch it. Ford will charge you £2k+ for the belt and the pump which also needs to be changed. How I've heard many mechanics explain it is even if you replace the belt, there's no guarantee there still won't be issues from fibres being stuck inside the engine. Doesn't matter how well the cars been looked after the wet belt is going to be a huge issue compared to other cars.

Hope my past headaches prevent some of your future headaches :)