If they saved enough for a house in three years, either they have a highly lucrative job or they’re in a market where homes are cheap or some combination of the two.
Depending on what anon does it's possible. The flag is Portuguese you could pick up a one bedroom apartment for 3 years wages if you don't live in Lisbon. Or in Lisbon if you have a good job.
My area, you can get a house for 100k, a better one for 200k. If you're saving most all income from a 75k job like programming, seems reasonable to be able to afford a house in that timeframe. But that's with very very little spending and still pretty cheap houses.