Hey guys thanks.
You are talking me into sense.
I would not spend 50K on a boat, no way. I wouldn't spend 50K on anything that does not give you back money. And although charters may give some money back this is a very old boat for Greece (most sailboats for charters are fairly new and beefy here in the Aegean/Ionian sea).
I was willing to spent 20K all together, but apart from 20K being very unrealistic I don't really have the time to work on the boat (I tried a lot to convince my self otherwise).
It's exactly as Gutterblack said, seeing the ad, It felt it's too much boat for the money.
So thanks again, I am keeping away.