Construction of a medieval hilltop castle with a courtyard

When you see a castle, have you ever asked yourself why our ancestors built such an impressive structure? 
How was it built and what might the castle have once looked like? We want to find out! With our ambitious
project we want to bring the nucleus of a medieval castle back to life. 
Using historical construction and settlement techniques, we will reconstruct the creation of a residential and 
fortress complex and revive it true to the original from the start. 
Can we possibly learn something from the past today? Everyone can join in and get involved. 
No matter whether in construction, the gardens or in planning and organization. 
We're building a castle! We are already active in various working groups and are struggling with the costs. 
As for specialist books, materials (wood, fabrics, needles, workshops) and excursions to gain insight into 
working methods. We are currently calculating a construction period of 15 years. 
We currently want to buy and pre-plant around 20 old apple trees, various. 
Build tables, benches, chairs and trestles, as well as make the first robes/underwear.