Two San Francisco landlords who evicted tenants and then turned their home into a lucrative vacation rental must pay $276,000 in penalties and abide by a tough injunction, according to the terms of a settlement with City Attorney Dennis Herrera. Illegal conversions that push long-term tenants out of their homes diminish the availability of residential rental units for San Franciscans, and they’re a significant contributor to our housing affordability crisis. Herrera said a listing described the four-bedroom residence as an “exquisitely renovated home” and charged $395 to $595 a night with a three-night minimum stay. Residential rentals of less than 30 days were long illegal — a ban that was loosely enforced, but in place when Herrera filed his suit in April 2014. [...] the city has enacted a new law starting Feb.