Do consider your opportunity cost if You are planning to sell cakes over there.
Flours, poultry-products are on a higher cost globally. Bakery in most part of Indonesia are operated by small-time businesses and they can afford to sell their products at much lesser profit.
Under world economic ranking, Indonesia is in 129 position - taking consideration into corruption and Business transpancy). At this current business situation, These surf as a factor in choosing business : familiarity, ease of international trade, demand and supply, politic trend. In Medan, there's alotsa richies, but do plan how You are going to win the heart of these customers, especially since You are already in a old trade.
If I were You, I would rather consider doing it in Malaysia, Jakarta or Singapore in a new distribution method(business model), unless You have a unique concept.
Juz my opinion
