hm, I really can't keep up with that. And I find it hard to understand, I admit.
Do you no longer drive on any road where a person has died in an accident? Do you no longer use a train that runs on tracks where someone has thrown themselves in front of it? Death is omnipresent, only we ignore it. I really can't comprehend it. For me, that's conspiracy theory stuff. But I admit, I also can't understand all the women who are still Catholic today, go to church every Sunday, and are told there that they are second-class people and not good enough for the priesthood. But please pay church tax, and if possible also good church money. Well, if you want to, go ahead.
I am relatively scientific about it and will not understand what changes (except the smell) when the priest waves his incense through the house. Yes, someone committed suicide there. That is sad, and we can feel sorry for a person who saw no meaning in life anymore. Maybe the WHY helps you to cope with it. You could ask the daughter about it. Personally, it doesn't affect me, not the room, not the house, only the person who is missing. But not you, rather the daughter or the other relatives.
You can bring in your "spirit" by incorporating your style, your liveliness.
The new house is supposed to cost 375K Euros? Including land and turnkey? I would rather think about it again, that seems VERY tight to me, and then the 350K Euros here look quite different.
But, as I said, I am rather rational. Still: I would make a very detailed list of the costs again. There will probably also be quite a bit of renovation work to be done on this house, which will be added to the 350K Euros; on the other hand, I am quite sure you cannot manage a single-family house with land and additional costs for 375K Euros. That would be the basis for my decision. Exactly rational.
If you will always have a problem with the fact that someone committed suicide there, then no matter how much I might understand that, this is not your house. But no one can make that decision for you.