Very solid? Is this supposed to be a joke? What exactly is very solid about three quarters of a million in credit with a 7k income? The equity is barely enough for a little more than the incidental costs. So I think this is a (price) bracket too high.
Well, it's interesting. At least numerically. While financing of €450,000 with a €4,500 income was often considered impossible in the cases presented here, €700,000 with a €7,000 income is rather appropriate here. The factor is identical, and in both cases it would be rather at the upper end of the scale, with 100 times the monthly income. Still, it is doable. The high savings rate, together with the rent, shows that over 30 years the sum would have to be repaid with about €2,400 monthly. In all examples here, it is anyway the case that nothing works anymore without two earners.