Hi, i will travel to Europe (July 15~18 or so) with my wife. I have 24 years and my wife 27 years. We will arrive at Madrid and probably stay with a friend (but if someone has a better way to spend 2 days at Madrid, welcome) for 1 or 2 days, then go to Barcelona (2 days too), Paris (i don't have place to stay yet, neither a friend there), England (no place to stay, only a friend), and then Italy.

We was thinking about travelling by train all the way, anyone has some tips to save some money?
I checked Euroline and Paris-London is like 65€, but if someone can help me to planify the trip, and, at the same time, to find where to stay (free or for a few bucks) at Paris and London (only 1 or 2 days, just enought to take some pictures) would be really nice.

We are from Chile, and want to have a nice tour around Europe
Thanks in advance for the help ^^