Budget all in won't work without a lot of own effort. Only a house in your region with economical sampling is well possible. ancillary building costs, kitchen, outdoor area, carport are missing
https://www.hausbau-forum.de/threads/liste-der-anfallenden-baunebenkosten-bauseits-teurer.9737/page-23#post-423407
https://www.hausbau-forum.de/threads/warum-ein-hausbau-fast-immer-teurer-kommt-als-kalkuliert.16237/
Where is north? Site plan? Where terrace, kitchen? Ground floor too few windows Cloakroom missing Door to utility room somewhat tight at least standard is not possible
Bedroom, little space left and right next to the bed Walk-in closet too narrow Window missing