Buying a house without equity

Basically a good idea. You know the house, have a good income and a low purchase price. Rent also comes in during the first 3 years. Why does the owner want to sell?

Basically a good idea. You know the house

But it could also be a typical 70s rental property. With 2 units, you should also look closely at how it can later be reasonably used as one.

The house must have been built around the seventies. The homeowner inherited the house and already had his own house at that time. His son (an architect) lived in our apartment and remodeled it according to his wishes. In other words, our apartment is already modernly equipped (new kitchen, walk-in shower, etc.). Then the son built his own house and moved out, and since then we have been living here. However, the landlord regularly comes here with his wife to maintain the garden. Since the garden is relatively huge but unfortunately located on a slope, the two of them will not be able to maintain the garden forever... I do not have exact details about modalities, size, price, etc. I only briefly spoke with him about a possible purchase. Before I go into details with him, I naturally wanted to inform myself beforehand... also here. The 2 apartments could already be combined quite well into one unit (that was apparently already the case before). So the plan or the thoughts on my part were exactly this: first to acquire the house through financing without equity and then later remodel it according to our wishes, but then with equity....

Does that also apply to 3-family houses?

No, only for 2 residential units. And only if the landlord also lives in the house.

Of course that's possible, we've done that too. I don't quite understand right now why it should be a 130% financing? You shouldn't have to finance more than 100%, otherwise it gets expensive. The additional purchase costs shouldn't be that high, given the purchase price and no real estate agent. But in any case, I would recommend talking to a financing broker, the interest rates are so low that, including rental income, you can probably live there almost for free in the end (for you, the monthly payment might only be about 200 euros).

But I would definitely talk to a financing broker first, the interest rates are so low that with the rental income you can probably live there almost for free in the end (you might only have about 200 euros left for the installment).

I would first have the house inspected by an expert and include the necessary renovation costs in the calculation. If a new heating system / windows / energy-efficient refurbishment are needed, then it won't stay at 170K€ purchase price, but at 250K€ and more,...