Sounds cool, like a fantasy. How far is the house from stores like groceries and other necessities? Must be out of the city I'm guessing? So you'd have to do a long drive every now and then to buy things?
The nearest city is about a 20 minute drive away. The region capital is about 30 minutes away. Lisbon & Porto are about 2.5 hours away each.
Anything I go to regularly is 20-40 minutes away.
The roads are of high quality and mostly empty. Petrol is about €1.80/litre, a return trip to Lisbon costs around €80 in fuel in my 2019 Suzuki with a 1 litre engine, plus around €20 in tolls assuming you take the motorway.