Finance a 1 million Euro house without equity?

I'm more of a non-present writer here, but why sell at all and urgently buy a property yourself? I would rather move into another apartment and try to acquire more (sales) properties. That way you remain liquid and generate decent cash flow. In any case, that would be worth considering if the stated income does not already include the rents from 10 (!) apartments.

I'll approach the horse from the other side. How much credit do you get from a bank with a monthly household income of €3,800? The bank surely won't allow a monthly repayment of more than €1,000. That would be a loan amount of €200,000 - €240,000. The purchase price (including additional costs, but excluding broker fees) is about €1,100,000. Therefore, €900,000 would have to be generated from the sale of the 1-room condominium. In Stuttgart, such a condo costs about €100,000 - €150,000, maybe a little less because it's rented out. So you would have to sell 7-8 condos in advance, because the bank will definitely want proof of equity. Or sell everything at your own pace and then see what the market offers. For €1,000,000 you can also find other attractive properties in Stuttgart.

I'll approach this from the other side. How much credit do you get from a bank with a monthly household income of €3,800? The bank will certainly not allow more than a monthly repayment of €1,000. That would be a loan amount of €200,000 - €240,000. The purchase price (including additional costs, but without a broker) is about €1,100,000. So €900,000 would have to be raised by selling the one-room condominium. In Stuttgart, such a condominium costs about €100,000 - €150,000, maybe a slight discount due to rental. So you would have to sell 7-8 condominiums in advance, because the bank will definitely want proof of equity.
Or sell everything calmly first and then see what the market offers. For €1,000,000 you can still find other attractive properties in Stuttgart.

I was just about to write that too, since apparently three apartments are supposed to be sold already. Even if you then have €300,000 in equity, you still have to finance €700,000. No bank will do that with a net salary of €4,000. Are the rental incomes already included in your net salary?
Let's assume you have €200 income per apartment after reserves, etc. That would be €1,400 for 7 apartments. So a total net income of €5,500 in the very best case. Even for that you currently won't get €700,000 financed. In 2022, with 2.4% interest and a similar net salary, we just managed to get €550,000.
Give us your numbers, then we can help better. Because as I see it now, there is currently no possibility.

First of all, thank you very much for all your input, I will comment on it in more detail later, but we have changed our plan a bit.

On two levels, I now realize that the way we planned it does not make sense.

Step 1
As announced, I will now sell 3 of my 1-room apartments, according to my real estate agent's valuation I can easily get 300,000 euros for them, probably more due to good rental potential and good location in Stuttgart. We will see how this goes, the 300,000 euros + X will be used as equity with the banks.

All sold properties are free of land charges!

Step 2
After the sale of the 3 apartments has been completed and the money has finally landed in the account, we want to buy a house but find a house for 1 million euros way too expensive. We have now canceled our planned house purchase.

Stuttgart and the surrounding area are quite expensive, everyone living here knows that.

But if you are willing to commute / work from home and accept +50 km, there are acceptable houses from 500,000 euros.

Semi-detached house where you can also do some work yourself.

Maximum 750,000 euros

Our goal is now to finance at least 50% of the purchase price with equity so that the installment is as low as possible.

In this regard, we will save significantly from February 1, 2025!

Measures

Sell second car / money
No more car tax / insurance
Cancel Netflix
Weekly restaurant visits will be abolished
Only drink water
No more sweets
3 vacations reduced to only 1 vacation per year.
Shop better so that food does not have to be thrown away.

I see considerable potential for savings with us.

We have an income of 5,000 euros net monthly (with the pure rents after tax and service charges etc.) and with our two incomes.

And we pay no rent.

I see considerable waste, which has only become apparent to us now.

Fundamentally, I think the plan is good, but don't forget to do something nice for yourselves every now and then ;) so if you already plan to reduce sugar and therefore want to avoid soft drinks and sweets, feel free to do so. However, when it comes to saving, it is probably just a drop in the ocean. But don't take away everything that somehow offers fun and balance, you don't want to live just for the house.

"Tomorrow I start"
"From February 1st"
… sounds like good resolutions for the new year. The main thing is not to start immediately but to put it off

Funny plan, I don't think you actually do it that way. You plan back and forth for so long that you end up doing something completely different anyway. I really don't see any consistent implementation.

Selling the apartments now - what nonsense is that? These plans are flawed. Keep the apartment…

You only sell property in an emergency. You are not in an emergency.