The Radisson Blu Royal Hotel might fit your needs. King beds, walking distance to Temple Bar, parking below the hotel, some nights outside of the summer season are around $200. The Maldron Hotel Smithfield also meets your criteria but is further from Temple Bar--not a problem, though, as the Luas light rail runs just outside the hotel and can get you into the center of Dublin in just a few minutes. Maldron is a small chain with hotels throughout Northern Ireland and Ireland, including several more in and around Dublin. Your price point will be hard to meet near the center of Dublin the closer you are to the tourist season, however.