Although the employment of business administration major is not difficult, the quality and potential of employment are OK. I think it's perfect as long as you grasp it carefully. If you apply for finance again, you need to pay more. Besides, if you are distracted, you may not have an advantage in employment, but there are many employment opportunities. But in fact, you don't have the advantages of similar finance major or similar engineering management major. After all, you have both.
Therefore, I don't recommend that you take a double degree. After all, only people with family ties will change careers to get a degree.
Hope useful to you