What I gather is what you want. Your dream house. There's nothing wrong with that, but you should still think about your partner and your shared life plans. What does she want? Does she want to clean all those square meters? Who will take care of the property?
What about children? If the house has to be sold again because of insolvency, then you’re pulling them out of their home. As a self-employed person, you take more risks – and that’s a good thing. But the people around you usually don’t.
In my opinion, you should buy something smaller and solid, pay off a lot early, your partner should be included in the contract so that in case of insolvency she could possibly take over the house entirely. Security for her and possibly the offspring or the dogs and, by the way, also for you.
Do you want to be old someday and still tell everyone "about your dream house" back then? Or would a smaller house be okay too, but with your partner still by your side, your children grown up with stability, etc., because you could manage it even during drops in revenue?