It may be helpful to give more information. Alternate translation: "If he does not first count the cost" (See: [[rc://en/ta/man/translate/figs-ellipsis]])
It is understood that he was not able to finish because he did not have enough money. This could be stated. Alternate translation: "does not have enough money to be able to finish" (See: [[rc://en/ta/man/translate/figs-explicit]])