BKK airport allocation help

Dear Aviation experts,

Need assitance in ubderstsnding as how shld i select the best possible route for my own fleet as in the snap there are 2 different ways

Adelaide: 3k wollars to assign , round trip cost 3498+ and maintainenxe cost 5.71

Taiwan: 11.5k wollars to assign, round trip cost 2154+ and maintaince cost 2154+

Help me in understanding the basics so i can gain maximum profits and know how as well…