BSK
What is the situation regarding the Cessna SIDs where you are?
This could add a huge amount to your maintenance costs and, if mandatory where you are, would effectively rule out a Cessna 150.
I would look again at your budget if you want to tour reliably. A good Cessna 150 is going to be hard to find anyway. A cheap PA28 140 will be old and tired. I would look at a more modern PA28 as this would also avoid the problems getting parts (unless you are really unlucky).
But if you are light and don't carry much with you, what is wrong with a good microlight? I hate to say it but I think GA in Europe is on a downward slope from which it will never recover.