Help with Fussy Foodie Friend

I am expecting a visit from a friend who loves Austin and especially loves the restaurant/organic/local food movement here. She is, however, on a limited budget and we have already decided that we will try to limit our dining to reasonably-priced destinations. Last year I took her to the downtown Farmer's Market and to Kerby Lane for some locally raised chow. This year I thought we might try some of the new trailer food as I understand that some of it is organic. If I were to choose places I would go with local dives that offer food that one may not find elsewhere but I feel obliged to take our guest's preferences into account. For example, I took another out of towner to the Texas Chili Parlor and later to Hut's but these places probably don't offer grass fed beef. Also, she would like to try and visit one of the local farms...I found the name of one of the goat farms on this board and may try to go there. Thanks for any help you may offer!