I definitely think calling around for local vets ahead of time is a great idea. Generally, a lot of monthly and daily maintenance can be done by an experienced goat owner. Most shots, hoof trimming, deworming, etc can be done by an owner. However, you will probably need a vet for fecal exams, and it's definitely a good idea to have one on hand for emergencies.
Generally, goats are pretty low maintenance, but it is a good idea to research diet and some of the more common medical conditions goats can suffer from. I agree that avoiding sale barns is a good idea. Also, knowing what vaccines are recommended for goats will help you with your maintenance.