Your studies to become a vet is a good choice as looking at the recent statistics in this field shows that growth from 12 percent from 2012 to 2022. Average income is at over $84,000 as reported below from The Bureau of Labor Statistics. Since Hawaii has a smaller population that the other states in the union, business would be better for you if you could open your own practice for example as you would have one the few vet centers to visit on the islands.
BLS report here is very helpful in getting information about this type of career:
As for finding out more about starting your own business (loans for example), suggest looking at information provided by the Small Business Association which offers a wealth of good ideas to get started: