Plan on your own. It will easy, cheap and flexible if you plan on your own. Check out air bnbs in the area you want to travel. For travel, Europe is very well connected with trains. Some particular trains are cheaper at particular times.
Hey! I think you should definitely plan your own trip. Loads of savings and you also are flexible with the things you want to do. I recently had been on a trip to Paris,Florence,Cinque Terre and Rome. Planned it all by myself, booked my flights well in advance so saved a big chunk there. Stayed in hostels and couchsurfed. Used Airbnb experiences to hang out with locals so that I’d be spending the minimum and enjoy the city the maximum. Use public transport another way to save and explore more. Beware of the tourist scams in Europe. Have a great trip ;) shoot me DM on instagram if you want more information. @vagabondfootsteps