Good evening,
Thanks for this helpful answer^^
Always happy to help. I think you are a dreamer – which at first is not necessarily a bad thing, often the opposite is the case... just not when it comes to building a house.
If it were that easy to build a house with little capital, you wouldn’t need to turn to a forum, the press would be bursting with reports; you would stumble upon information even on a billboard in the middle of nowhere. But since you are asking, you shouldn’t be surprised to receive answers that are not entirely serious.
Why should a kit house, which in turn is to be assembled and finished by professionals, be significantly cheaper than the usual "turnkey" option? Kit houses serve the purpose of enabling very skilled craftsmen to realize the dream of owning a house. Awarding the trades to professional companies is rather counterproductive there.
You have no plot of land, equity of EUR 10,000 and a bank that would finance you EUR 180,000. That won’t get you far, neither in Berlin nor even in the East. After deducting expected additional construction costs, only EUR 150,000 remain for land and house.
What remains is the expert-supported purchase of an existing property, the purchase of a condominium, the purchase of a dacha and hope that the land will develop into building land in the medium term, regularly attending auctions... or continue to build equity and say goodbye to the hope that building a house could ever become cheaper again... or ask Aunt Google about "single house," "mini house," "micro house," "small house," or "tiny houses" and decide whether the informational sites being created could be an alternative for you.
You still need a plot of land – in some cases even some kind of trailer; but it can be much smaller and thus – if you are happy with little floor space – bring your dream of your own home perhaps within reach.
Rhenish regards