Alchemy, at least once you have reached a certain level of skill and acquired a few high-demand recipes, is a fairly good money-making venture (especially when combined with Herbalism). Compared to other production professions (Blacksmithing, Enchanting, Leatherworking, Tailoring), goods you sell from Alchemy are, for the most part, consumable so your customers will keep coming back for more. Also, there isn't anything that requires farming ridiculous amounts of rare materials; even the highest-level recipes require only a few herbs per potion. Although some of the recipes are quite difficult or time-consuming to obtain, these recipes will become your premier money-makers.