Well it depends on your budget is and what you are tired of the most.
If you are tried of everything being manual then: A, B, C
If you want to put safety first then: B, A, C
If you want to go by least expensive then: A, C, B
If you want to go by the level of work then: C,A,B
So as you see it all depends on what your priorities are. Good Luck
