First I began to project by drawing blueprints of the house and putting dimensions.
Bird Eye View of the Cottage Without the Roof.
When I finished the blueprints, I started to create the same house in Tinkercad(3-dimensional). I did the windows, doors, roof and the walls.
Here are some pictures of my house.
And then I calculate that how much heat, paint and shingles for the roof I need to use.
Coach V needs 40 Euros for paint.
And 630 Euros for shingles.
630 Euros for the shingles + 288 Euros for heating + 40 Euros for painting so it equals to 958 Euros.