Assessment of financing scope with 4620 euros net

With an income of just under 5k, it somehow bothers me that you have to finance the car yourself. If the equity capital were invested somewhere at the same time, it would be okay for me again. During my studies, I somehow spent money on clothes, parties, and so on as if there were no tomorrow. But eventually, you do grow up ;)

My best winter jackets / shirts are partly the cheapest things from discount stores or HaaundEmmm...

20€ very very sporty, no question... Triple digits in my opinion totally exaggerated, especially if you don't value "brands".

We make a big mix there. Many things (like crap clothes for home) cheap discount store goods. But for shoes, winter jackets & co, we do like to buy brands. We budget 150€ per month for clothing. We don’t spend that much by far, that’s true. I still keep it like that in the calculation, simply because I don’t want to stand in front of a nice sweater someday and not be able to buy it. So it’s with a good buffer. I think you can surely get by with less, but I still consider 20 unrealistic or an amount you won’t be happy with in the long run. These calculations aren’t made for a few months, you consider whether you can cope more or less permanently with the income and expense situation.

With an income of just under 5k, it somehow bothers me that you have to finance the car yourself. If the equity were simultaneously invested somewhere, that would be okay for me again. During my studies, I somehow spent money on clothes, parties, and stuff like there was no tomorrow. But eventually, you do grow up ;)

and there is no equity. and with that income and age, there would have been enough time to save something up

Yes, I also find 20 very tight, unless you keep patching up the discount clothes again and again. Your buffer also makes sense, the question is whether you really need a monthly one or if a fixed base amount of - no idea, 200 per person - would be enough. Then you cover wear and tear with 30 EUR per person, and for children 50 EUR per person (they still grow and generally break things faster).

and there is no equity. and with that income and age there would have been enough time to save something

Unfortunately, this is internet judgmentality again. We have not walked a meter in these people's shoes. Not everyone's life story is perfectly straight. At the moment they have this income, how long it has been like that and whether there were previous burdens and debts to be paid off, we do not know.

Looking purely at the numbers, however, it looks rather bleak for the desired project.

Just quickly did the math again.

So let's assume you could manage with €650k. €240k for the plot of land. €410k for the house, now without a basement and calculated optimistically. You have no equity; the €20k will probably be used up for the kitchen and incidental costs, that won't even be enough.

Let's calculate with an average age of 35 and say there are about 30 years left until retirement.
You have a net income of €4620. For simplicity's sake, I'll calculate with these flat rates – the rule of thumb is that up to 30% of income for the mortgage payment is still okay. That would be €1386. Let's generously round up to a €1500 payment.

Assuming a fictional interest rate of 1.8% and a 15-year term, that results in an outstanding debt of €541.6k. That's a lot of debt, 15 years before retirement.
I also see another problem: Would you even get the 1.8%, or would the conditions be worse with such a large financing amount and no equity? Or rather: Would you even get financing at all?

Scenario 2, let's say you could handle a €2000 payment.
With that, at 1.8% interest rate, there would still be an outstanding debt of €438k after 15 years.

No matter how you look at it, it's not going to work out easily.