Not sure how many miles you will get without losing reliability. I've covered 33k miles since new and a few snags are beginning to arise. Ford claim that ecoboost engines are good for 150k in test conditions, but real world is always different.
What sort of snags? Some parts will wear with age but at 33k, I'd expect nothing worse than tyres/brakes.
Yes, you're quite right about 150k in test conditions, the real world is very different.
If you could see the 'test conditions', you'd have nothing to fear. They are extreme to say the very least.
Your cambelt is probably good for at least 250k and by that time oxidisation would have eaten the rest of the car.