First of all, a good offer with some small untruths. With a gas boiler, solar is not mandatory, but the addition of a renewable energy source is, which could also be a controlled residential ventilation system with heat recovery. And if solar, a system solely for hot water heating would be sufficient; heating support is not required, costs a lot of money and space, and is of little use. So, you can ask him about a gas boiler with pure solar hot water heating, which would probably only cost an additional 4. The whole geothermal stuff is uneconomically expensive. The masonry garage is not actually masonry for the concrete plant, but certainly much cheaper. The socket package is super cheap. The sash windows, well, you have to want them, no advantage, stupid when looking out, super expensive. Some essentials are missing, but lots of roller shutter stuff. Two outdoor water taps should be there, an underground cable outside with five cores for electricity in the garden, a utility sink somewhere, a forced ventilator in the bathroom so that the shower air also gets out when someone does not ventilate or ventilates too briefly. The exterior plaster facade should not only consist of colored plaster but also receive a silicone resin coating; then the color will last a long time. That’s the summary. Karsten