About 50K for Business OW is a good deal. We used 75K from Avios for a OW Business ticket on Air Italy from Milan to New York; the worst Business class I ever took vs. 25K in economy; a good deal.
However what did you pay in fees? We paid $200 same as in economy.
I was in Dubrovnik in 1972. We stayed at the Excelsior which one can see in your picture. What i liked is that it is on the ocean and one can swim off the platform.
Was it easy to drive in Croatia / Bosnia? Was it expensive as it was an automatic + one way drop off I assume.
Thanks.