train travel in croatia

$ 7000 is enough money to travel to Europe for 2 months?
I want to travel to the following countries: Italy, England, Ireland, Belgium, Nederlands, France, Spain, Germany, Greece, Croatia, Hungary. My plan is to stay in hostels and either travel to each country or taking a train. I havent decided on that time. I do not require much. But I want to make sure I have enough money to fully enjoy Europe.
Does not include airfare might be enough. Just make sure to stay in the budget. And it definitely would have to stay in motels. Want figure of $ 100 per day, and use the train.
Travel Zadar train station Croatia 201