We will be staying in Trogir, Dubrovnik, and some combination of Korcula, Mljet, Kotor and Mostar. We are a family of four (two young children, ages 3 and 5) looking for clean, basic-but-comfortable apartments within easy walking distance of Old Towns/major sites (say, 5-10 minutes). I've been researching different places but am having a hard time confirming a realistic price range; either prices aren't listed or they're all over the place for seemingly similar accommodations. Is $US60/night a good guess or do I need to budget significantly more? Thanks in advance for your help. Specific apartment recommendations also welcome!