Will this site get permitted?
Permitting is what stalls German padel projects, and it is the one thing a cost calculator cannot tell you. Answer eight questions about the site and get a risk tier, a realistic duration, and what the approvals will cost you, before you pay an architect to find out.
What this is based on
The noise thresholds and the rules for building outside a built-up area come from German federal law. The week and euro ranges do not. Those are orientation figures from projects we have seen, and they are the part you should test against your own quotes.