Fastest way to get money in Skyrim? [duplicate]

The easiest way to get money is through alchemy. Most of the alchemy merchants have alchemy tables in their shop, so you can buy ingredients, craft, sell the resulting potions, then fast travel to the next town and repeat. Be careful to avoid buying expensive ingredients like void salts, fire salts, and especially the daedra heart.

Often when you fast travel to the next town, it'll be night. The best way to wait until morning is to go to the inn and just wait the time in the main hall, don't bother spending money on a room, they don't hassle you for sleeping in the hall.

Be aware that potions will decrease in value as you increase the supply of the potion, alchemy is best used to get the money to start on some other means of making money like making banish-enchanted daggers.