Stubborn Dad rebuilding old house?

Question

My Dad just bought an 50yo house and started rebuiling. I feel like experienced in this area from my previous activities and was trying to convice my Dad to knock it down and build a new one. The house is in Europe made of solid bricks and has NO historical value.
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I did a project analysis showing advantages and disadvantages of both options favoring the option of knocking it down and building a new one. My Dad would stubbornly not listen.
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After three months of rebuilidng, ALL the problems described have shown up including statics, wet walls, wooden ceiling and others. My Dad would admit now his decision was wrong but he is keeping on rebuiling it because as he said, he already has gone too far to start it over.
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I think he should stop it and knock it down even at this point. It seems that I have a problem seeing my dad executing a stupid decision. I know it is none of my business, but just can't be seeing my closest relative to do stupid things.
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What should I do?

Thanks man, the thing is it is not about if he is wrong or I am right. It is about doing thing which as been proven wrong and admitted wrong!
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I do understand that sometimes one enjoys doing stupid things but this is about something else. This is about admitelly doing stupid thing! I am trying to be on my Dads side, but he even could not answer what he needs that house for! He became a slave of opportunity. He for some reason denies what he needs and does what he thinks is "right", no matter if it is for him or someone else. Many times, he regrets what he did.
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The probem is he would never listen and I think it is more value to him to do what he wants than the result of his job, which however affects others..
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Yes it is my problem, I just need to overcome it somehow.

Answer 1

I'd say it sounds like stubbornness runs in the family, lol ;)

Have you stopped to consider that maybe the process of renovating the home is what your dad is actually in this for? Some of us just enjoy the work, and the work itself is the reward, hehehe.. much to the confusion of others. It's not about making a profit, though its nice when that happens... but it's not the 'goal'.

There's a definition of friendship - "A friend will come bail you out of jail, in the morning. A good friend will come down in the middle of the night, to bail you out... But a best friend will be sitting right beside you saying "Wasnt that something!" hehehe

Rather than pointing out that 'he was wrong/you were right' -- see what you can do to help him. Spend some time working together! If he's determined to, in your opinion, do something stupid - go do it with him! He'll appreciate that a lot more than your sitting on the side and pointing out how wrong he was. hehehehe

Good Luck