One profession I believe that will never go out of demand is dressmaking. A colleague the other day was lamenting about the increasing cost of getting her clothes tailored and with the Chinese New Year just around the corner, prices have further increased.
Being on the plus side, she finds it difficult to find clothes off-the-rack. KL does have stores catering to plus sizes but they are few and far between. Besides seeking the seamstress's service, she sometimes goes online. Shopping online is a good option where one can also find plus size prom dresses, if need be.
By the way, AEON department stores in Kuala Lumpur do have a good selection of Plus size clothes, so do F.O.S. outlets and Reject Shop.