Financing land and house? Taking out a mortgage? Construction costs?

As already noted, the item windows is actually the best item to save on. Wood-aluminum is more than 3 times as expensive compared to plastic.

3 times as expensive, alright... I have the direct comparison from the window maker. Windows in plastic 55k Windows in wood-aluminum 72k All the same, only different material.

Difference between plastic (Veka) and wood/aluminum (Gaulhofer) was more than a factor of 2 in our quotes as a complete service including installation.

You have absolutely no clue

This is not surprising at all if you have known the forum members here for a longer time. For the colleague HilfeHilfe, I have already set up a chauvinist pig on another occasion, and he skillfully and with pleasure keeps throwing in a Heiermann every now and then. Everyone does as they can. Take it with humor!

Out of interest: You said you now know what you're doing? What exactly? What has changed compared to before?