Total: 610,000 with all the bells and whistles
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Repayment should be completed after 22 years. We are already older.
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I would like a fixed rate but also with the option to change once in the middle. Maybe rather around 1700 euros.
Let's assume you have about 100,000€ equity, so 500,000€ loan.
To have everything paid off in 22 years with 1% interest, the monthly rate would have to be at 2,100€.
Your rate sounds more like a 600,000€ loan with 2.5% repayment. That would amount to about 1800€ per month. That would correspond to an annuity of about 2550€ per month to be done in 22 years.
Income: 5,000 without special income
Besides the loan amount and equity, the special income would certainly be interesting to know. Is a special repayment even realistic?