Solo Balkan trip for 3 weeks from Australia . Any suggestion would be amazing

Hi , so I’m planning to visit the Balkans countries early August for 21 - 23 days . If someone can review my itinerary and let me know what you think ? Plus how much l should bring with me if we put into consideration l will stay in hostel , walk a lot and use public transportation and have lots of local food . And maybe 1 - 2 activities per country.

Dubrovnik 3 nighat 
spilt 3 
Sarajevo 2 
Mostar 2 
Budva 4 nights but going to Kotor and Tivat 
Tiranë 1 - 2 
Vlorë 2 
Sarandë 2 
Prizren 2 
Pejë 1 

Much appreciate it guys 🙏