To close this thread for now.
Thank you all for your kind and useful responces.
However, it turned out that the main showstopper is visa.
We can't get it for such a long time (a month), as it would be our first one.
Things get even more complicated, since my girlfriend right now is not
a student and does not have a job. They say we should build our
"Shengen history" and after one-two (more - better) short and regular
tours we can hope to get month-long visa anywhere we want.
Taking this into account, we have to postpone our Trip to the next
year and try to make two tours to shengen this year.
It's a pity, since tours via travel agencies are about twice as
expensive, but they are our only legal gates to europe.
Moveover, the choice of the first place to visit is also restricted.
We wanted to make London-Paris tour, but GB has very strict rules and
rules us out. Possibly, it will be France and/or Italy as the most
permissive ones.
Will try to match our DreamTrip with the next LAC.
Kind regards,
Dmitry.