fat content depends on what they are fed, it should be pretty similar to other 'grass fed' beef and wild game. If they are local i suggest you support them
I used to live near the largest alpaca herd in the country and he was on the incredibly short list of people who would sell alpaca meat. $6/lb isn't out of line so i'd support him when i could. he was an older guy (80's) and finally closed up and put the 1k+ acre land for sale. apparently tenino has changed a bunch in his 20 years there and they wouldn't grant him permits to try and have festivals and such to promote his business, easier to sell what is likely over a million $ in land to a developer to break up than to keep the farm going and sell it as that.
having an outlet and creating a market is the tough part. it took years and years and huge money to get bison onto safeway shelves.
I'd rather not raise cows as i like alpacas in the general sense, but it seems like i might need to also start my own pop up food trailer just to have an outlet to sell the stuff to people