Then prepare yourself for the fact that your "should" will not be fully achievable as such. If the basic costs of the house amount to 306k, certainly something will be added. Even with a good basic equipment from the provider, here and there smaller surcharges will likely come up (more electrical installations, foiled windows?, maybe still a lift-and-slide door?, stairs are often upgraded, larger tile formats etc...) and with an upgrade buffer, ancillary construction costs, outdoor facilities, parking spaces (are these supposed to be carports?) I see 350k as not realistic. I would rather roughly calculate like this 320k for the house (that is really not much upgrading) 30k ancillary construction costs (can you already estimate the earthworks for your "slight" slope?) 30k outdoor facilities including carports 50k painting and interior fittings (kitchen, furniture, lamps) 100k plot of land So I see a capital requirement of about 530k and thus 430k credit. Nevertheless, I consider this loan manageable for you. You have everything well in view and are structured. You can tackle this, but keep in mind that almost no one comes in with their original calculation.