Alpacas are easy to care for. 3 sided barn, water and food and your pretty much done. The problem is cost of the stock. The issue is who are you going to sell to? Llama's and Alpacas have two markets. Fiber market and animal resale market. Alpaca's are to expensive to make back any money using only the fiber. Resale to other breeders requires a lot of showing and smoozing, That takes time and some money.
Figure a quality female alpaca is going to cost $10000 to $2000 (yes 10 to 20 thousand), you have to sell lots of fiber at $2/ounce to make back your money. There are ads on TV and print that you can make a fortune in alpaca's. For those who got in early they might make some money, but as the seller base grows the market shrinks and value drops.
If you want wool, then llamas are reasonable cost effetive for quality fiber producing aniamls. $1000-$3000 for big name, under $1000 for put quality animals.