Hey Ben,
welcome to the 7summits forum!
First of all a quote for you:
All men dream, but unequally. Those that dream at night in the dusty recesses of their minds awake the next day to find that their dreams were just vanity. But those who dream during the day with their eyes wide open are dangerous men; they act out their dreams to make them reality." ~Thomas Edward Lawrence

I think it's a cool idea, but ofcourse money is always a problem.
Maybe you can start by climbing the highest peaks in the 5 countries you mentioned (+Scotland ofcourse). That should get you some sponsoring from the mayors of all cities? If you have proved yourself, you can go farther and go for the big 7...
Keep us posted, good luck.