Apparently you haven't seen any of the recent crop prices or farm numbers. Bio-diesel, ethanol, and every other bio-mass produced product has driven the demand for agriculture WAY up. Farming commodities are through the roof and farm istates are expecting giant economic boosts as more ethanol plants start to come online.
I won't pretend to be an expert on farming or agriculture, but what little I've read gives the impression that the small/family farm is struggling. Crop prices are not the same thing as farm profits, nor those profits realized from end-users such as ethanol plants. I'm not aware that farm commodities provide much more than subsistence living for the small/family farms which are being taken over by giant corporations, just as Wal-Mart is driving out the five and dimes. It may be well and good for the consumer and corporate investor, but many individual farms still suffer due to a harsh winter, wet spring, or dry summer.
My Mom is big into spinning wool into yarn, she loves it, She knits and Crochets. She really enjoys doing it.
I respectfully suggest that this is entirely different from owning and/or running an alpaca farm.