Sherwood House (known to locals as the MM Swimming Pool), 21/25 Dechawut Rd (some maps may indicate Dechawut Rd as Pa Thon Rd), ☎ +66 86 666 0813, [10]. Well-located in the heart of downtown, this cozy guest house has five rooms and a free swimming pool. Located right around the corner from a food fair and walking distance from the on-island ruins. The house has a decent restaurant offering both Thai and Western food, and bicycle rentals. Shared bathroom. Free Wi-Fi. Fan double 320 baht; air-con double 420 baht. edit
Thong Chai Guest House, (On a road directly opposite Wat Ratchaburana). A little away from the main action, but closer to the sights, this guesthouse offering fan-only rooms at 200 baht a night with private bathrooms, this is a more Thai-oriented guest house. Watch out, this is maybe too basic for you. Compared to what you get in Bangkok for 200 baht this is worse: no place to hang up the towel. You get a soap, but there is no place to put it in the bathroom. No sink: You can't wash your stuff. No flush (this is indeed Thai style). 200 baht. edit
Tony's Place, Soy 2 (On the main hostel strip opposite Planet Earth bar), [11]. checkout: 11. Many rooms, a decent-priced bar with many seating options and areas to relax. Sometimes live music. Free swimming pool and wi-fi. Prices start from 200 baht for a double room with fan and shared (but clean) bathrooom. edit