Is financing for house purchase / house construction feasible?

With little equity, there is also little buffer. We are noticing ourselves that it is getting more and more expensive. Different bathroom, KNX, then LED light coves means 5 power feeds each with 5x2.5 cables chased from the ceiling. Large distribution cabinet. Different floor... These quickly add up to 10-15K additional costs. The kitchen is also constantly downplayed, but for us it's also 20K.

Well, it's your own fault. It's not like you need all that to be happy.

It was to be expected and therefore a sufficiently large buffer was planned. Especially KNX and bathroom wiring can no longer be retrofitted. Otherwise, a lot is prepared and then done by ourselves, such as installation and programming of all KNX participants and mounting the [Lichtvouten].