House construction project - Reality check

I can well understand that at 33, one might want to build a house as a single person. You first have to find a suitable used property, and here too, (1) additional costs and (2) renovation costs will incur. At this point, I would possibly build a single-family house with a granny flat or a semi-detached house and rent out one unit.

I would possibly build a single-family house with a granny flat or a semi-detached house and rent out one unit.

Wow. Taking on even more debt when the "small" financing is barely manageable already. And then bringing a tenant into the house for a lot of money, who can hardly contribute anything to the larger financing. Works great. Renting out a semi-detached house has a yield of sometimes less than 2% - before taxes and maintenance - with normal construction costs. That's also a great idea for someone who can hardly afford their own house.

There is still another option:

First save and build later. Let me put it this way: At 33 and with your salary, your equity is at best okay. If the dream in life, even as a single person, is to have your own house, then you just have to save and invest more. If you had done that in the past, your equity would already be more substantial now and a small dream house might be financeable. At 40 you can take another look (hopefully your portfolio has developed favorably in relation to construction prices and 20 years will also be enough time to pay it off) or your private situation has in the meantime opened up new possibilities (partner) and the house can then be financed accordingly.

First save and build later. I'll put it this way: At 33 and with your salary, your equity is at best okay. At 40 you can take another look

As someone clueless, I'm confused again here. Would you rather keep paying rent for seven more years instead of starting to pay off a loan? With 500€ cold rent, that's 42,000€ lost.

As a clueless person, I'm completely at a loss here again. Is it better to keep paying rent for another seven years instead of starting to repay already? At 500@ cold, that's 42,000€ lost.

Or build now and pay 300k interest given your circumstances. Is that better?

Or build now and pay 300k interest on its conditions. Is that better?

The already mentioned idea is a "starter property". Whether it has to be a house, I don't know. I would start with a used condominium. A 200k apartment is paid off by the OP after 10 years.