It would depend on the speed of execution, if you can do the same amount of work in 5 days with spending 5k, vs spending a month and 5k on a human the math makes more sense.
You won't know which path has larger long term costs, for a example, what if the AI version costs 10x to run?
You won't know which path has larger long term costs, for a example, what if the AI version costs 10x to run?