Economizing travels, whether they are buskers or not, have a way of busking4freedom in the sense that we/they search for the best combination of gear, clothes, especially all weather togs. We Make DO with what we find, keeping peace with ourselves by remembering the phrase used in Japan for a buddhist monk's beggar's bowl - orioki...just enough. So, we make do with what we've got, until we find something that suits our purpose. Yard/Garage Sales, "flea" markets, and thrift stores are treasure troves for this.
Happy camper I was when I found the combination back pack/shoulder bag a few years ago in a shop in Bloomington, Indiana. There were 2 of them. I bought the one with the shoulder strap. The other identical model had this handy accessory missing. The pictures below show the various features of the DESTINATION brand luggage - the differnt combinations of things that will fit in it.