Interviewing small shop owners in Mexico -- 2

I need someone who is fluent in Spanish and English to walk around any major city of Mexico (Mexico City, Guadalajara, etc.) and interview small shops to understand the way they obtain their products. These small shops sell apparel, house and kitchen items, jewelry, pet items, beauty items, food and grocery, health items, etc. The interview will consist of a 20-question survey I have prepared, which includes questions such as, "how many unique items do you sell?" and "how do you find new products to sell?" and "where do you buy your products?". You will then need to translate the results from Spanish into English and send me the results. I will pay 10 USD / ~215 MXN for each completed interview with a bonus for high quality work.