Each of the three Negev tech communes in San Francisco has run into problems ranging from code violations to a lawsuit, and it all started at a small property on 12th Street in South of Market. Danny Haber, 26, and Alon Gutman, 27, first became involved in their communal housing setups last year with a live-work property at 200 12th St. called The Negev Twelfth. The property became a model for at least two other…