Have you already signed anything? Otherwise, choose another bank. As a rule, both debtors are fully liable for the loan, i.e. if the bank includes you, it only benefits from it but has no risk.
The bank says I am not a customer with them and cannot prove any income, so they do not want to accept me. I don't really understand it either. Getting married like that is not good in my opinion, it feels forced and purposeful. Also, it would have to happen very quickly now.
I would inquire again at other banks or through brokers. Do you have an employment contract? Have them put in writing from when you can start again and at what salary. Our bank recognized that at the time.
Who is "the bank"? I have been working in finance for 30 years and frankly, I have never heard such nonsense. Go to the fries stand – or was it a butcher? – to a real bank where such a situation is normal. Every day we close such financings with only one earner. That is absolute day-to-day business. I would leave your bank immediately if they gave you such advice.
Getting married like that, I don't think is good; it feels forced and utilitarian.
Well, the reason would probably be the child they have together?! As if there is no better reason than the child of love. It should feel right, shouldn't it?
Only after that comes the house construction.
I don't think getting married like that is good, it feels forced and purposeful. Besides, it would have to happen very quickly now.
Oh dear, family and a shared house - that binds you so firmly, the wedding vow is trivial in comparison. It is a good time to also take advantage of the legal benefits of living together. The paperwork can be signed quickly now. The romantic wedding celebration can be made up soon after.
And because of your young age and this thread, a well-intentioned piece of advice for financing and construction: Don’t believe everything you are told and engage independent expertise (financial advisor, architect/engineer) who supports you and has your best interests in mind, as you are their client.