Those are beautiful barns from the website. Living in a loft makes good sense for places that have limited land or don't have the budget for a series of individual buildings. If I were to live in a loft I would be thinking of safety first (for both upper and lower occupants) with regard to wiring, heating systems, etc., that exceed minimal acceptable standards. I don't know if noise, smells and dust would be problems but should be considered as well. Other than that, you'd need to check out insurance, taxation pros/cons and whether the local county/municipality allows such buildings and you're good to go.