Well, the price is definitely ambitious. Better plan for 50k more and at first, you'll only have a sand hill in the garden. Go to your house bank and to 1-2 brokers. Just call and give them the current status, they also know that you don't build a house every few months. Get offers and post them here again so a few people can take a look.
By the way, we were at the bank almost 2 years before construction started to discuss what was possible and which options were available. When it got more concrete, we had 2-3 more appointments where everything was finalized.
We already know which bank we want to go to through several acquaintances who also had positive experiences there, also regarding conditions.
We don't know exactly how much equity we will put in. Definitely 30k.
How much does one plan for ancillary construction costs? Also 20-30k?
What might still cause problems with the bank where we are uncertain is our income. The plot is already secured and paid for. However, I am still studying and my girlfriend is a civil servant.
For security, my parents could still act as guarantors for me with other plots they own.
We are not quite sure whether the bank will grant us the home loan because of this!
What do you think?