Bridge financing - New construction immediately after new construction?

Of course, it works

I rather don't think so

I rather don't believe that

Why not? It's common practice. Normally, most banks offer a pledge exchange directly. Alternatively, sell the house, pledge money for a maximum of 1 year and use it to pay for the new place. At least that's how we and most Volksbank/Raiffeisenbank + Sparkassen do it.

I built 2 LEGO houses with Junior yesterday it was also fun

And? - was Junior able to understand the saying that you learn from the enemy home through the friend home to the own home?