I toured from London, UK to Tours, France and then East to Budapest on the Eurovelo 6 route Summer 2013.
Here is a link to my journal on CGOAB:
https://www.crazyguyonabike.com/doc/..._id=12792&v=nW
I am 64 years old.
My daily expenses were quite high. After pedaling my huge LHT fully loaded for 60 miles I was exhausted most nights. I really enjoyed the few nights of camping, in great locations, but those are getting harder to find on the tour, and when you are tired, dirty, hungry and come into a strange city alone, a hotel can look pretty good.
I camped three nights very cheap, like $8-15, stayed cheap hostels 3 times for $25 or so.
For the other 30 or so days costs for hotels ranged from a low of $35 ( Formula1) to a high of $135+ (Ibis Downtown) in large cities. I used Booking.com to find a hotel in the town ahead in the afternoons.
Breakfast, usually bakery goods and coffee on the road ran about $5, but often $10 or more if at a fancy hotel. Then I would wrap up some rolls and meat for lunches...
Lunch, like a kabap sandwich in Germany or a baguette with ham and cheese with a drink, maybe $5-$10, but often more if there was a nicer restaurant and nothing else, so lets say $15-20 on those days. Dinners were a big meal for me with a beer or two, $25. Like Weiner Schnitzle with all the trimmings in Germany.
Whenever I passed a bakery I stopped and bought bread and pastries , and it was eaten every day, all day.
A few stops for cold soft drinks, cokes cost $3+ over there. Often got cold water for free in restaurants as I was leaving.
I took a ferry from UK to France, $20 for me and bike.
I took a train from Lille to Paris and on to Tours, about $120
I took a cab to the airport in NY, $45 with bike
I took a cab in Budapest to the airport, Euro 50 with bike.
So, you can see that I spent anything from $35-$200 per day, and that 37 day European trip totaled over $6000 including airfare and other transport.
As others have reported, you can tour for a lot less. Camp out every night, cook your own food. Get your friends to drive you to the airport. Carpe Diem.