I am looking to buy a condo on Ellis, how safe is that area? Are people willing to come live there?

It really depends where on Ellis. The Tenderloin area, between Mason and Polk on Ellis, is still scary, despite it's more "trendy" reputation lately. Creepy, persistent hobo lurkers, people taking a crap on your stoop (if not also sleeping there), no parking, car break-ins even if you can park. If you are a woman I would not recommend living there, if you're a tough-looking guy who doesn't have a car (or who has a condo with a garage), it might be worth the convenient location. Also, it's not a cute "Sesame Street" type neighborhood--pretty much just laundromats, corner stores, Thai food and massage parlors--check out how close grocery stores, coffee, etc., are.