I would suggest you think about what you really need in support and have pointed questions for your potential consultants about how they will assist you with each which I think is more important than where they are located. I've worked with many students located in India...Skype is a wonderful product!
MBA consultants can do a lot to help an applicant, it really depends on what you need and your individual situation. To give you an idea, here is what I do with my clients.
-Game planning. Helping you figure out the right application strategy, goals, target schools.
-Essay brainstorming, edits and reviews
-Resume brainstorming, edits and reviews
-Recommender selection and prep
-Mock interviews
-School decision