Hello ToNKeY,
we are also building in Saxony and do not have a huge budget either. The goal is a maximum of 280K€ for a 2-story KFW70 house with 125m² including land, incidental costs, outdoor facilities, and materials for DIY work (floor coverings/painting). We have kept many things standard, but in one place or another you still want to have an eye-catcher. The land alone costs 47K€.
In my opinion, with your budget you still have to cut something, then at least the house price fits. We also initially wanted a chimney flue but then removed it. For a chimney flue and a simple wood stove you quickly end up spending over 10K€. Electric roller shutters are nice, but they add up as well. That’s why we only equipped the patio door with them. For us, the extra cost for the air heat pump or ground collector compared to gas+solar was about 10K€. With a geothermal heat pump including drilling, it would have been significantly more. We decided on the ground collector.
I see the ratio between income and loan amount as much more problematic. For every 100K€, you usually calculate 500€ monthly payment. That only works now by reducing the repayment rate to 1%. If then income restrictions (parental allowance) or expense increases (childcare, purchases/ongoing costs for the child) come into play, you quickly reach the limit.
In all your calculations rent vs. building a house, you didn’t consider one thing: at some point, the first repairs start with the house and then the 20K€ saved in post #8 are quickly used up. The older the house gets, the more repairs there will be.
By the way, for the financing we visited branches of the 2 big online intermediaries locally. Based on the filter criteria I specified, the corresponding financing options were selected. Both intermediaries came to similar results. You could sometimes follow this live on the computer. I never felt pressured towards the offer best for the intermediary. However, at least these two intermediaries earn their money through the “volume.” You have to be aware of that. In the end, contrary to my expectations, we ended up with the local savings bank through the intermediary, which after a special inquiry issued an improved offer to get us as customers.
First, get advice on how much you can even afford. I claim that what you are currently planning, you definitely will not be able to afford.