Question regarding the feasibility of financing

Calculations are whether children are included in the house ... no, wrongly expressed: they are inside but associated with many restrictions ... then no more eating out, no nails done etc etc .... I have to think about whether I want that .... [...] But the advice to move somewhere else bothers me a bit .... Family lives here, workplace is here, what am I supposed to do in Lower Saxony without the job and the family ??

One does not exclude the other. If I want to see the Five images in the wild, I have to go to Africa. They just don't exist in Meck Pomm. Or skyscrapers in Beijing..

It still depends a bit on the equity, right? As I said, with the salary and no inheritance, no chance with children. As a couple and with decent equity, of course feasible.

Visiting the nail salon vs. having children? I've never heard that aspect before..

No inheritance, manageable equity, one child. It just depends on the requirements.

So without parental support, I actually also consider it pretty impossible.
We have some equity through free accommodation and a lot of active support, and we are still pretty much at the limit of what can be done with 5k.
But there are still cheaper regions in Bavaria. In Hof you can definitely get further with 5k than in the metropolitan areas.

: I think we won't agree regarding parental support
I would only guess that your parents are not wealthy themselves and that it would understandably be difficult for you to accept support.
For example, during studies it is even legally required that parents financially support their children, so the legislator obviously considers it financially reasonable. Why should a child not be allowed to accept the help that is rightfully theirs?
You may have accepted Bafög and partly financed your studies with public funds?