I found that Naples hotels can be somewhat expensive if you travel there in the high season. The off-season might be a good time to go, or you can certainly find some less expensive options. The restaurants will also be less crowded.
Inn of Naples: A very good value a short drive north of downtown and Old Naples. I enjoyed a king room. Breakfast is included in the room rate. 4055 Tamiami Trail (Rt 41) North.
Inn on 5th: An upscale boutique hotel at 699 5th Avenue South. It has a lovely restaurant, Avenue 5, on the first floor. It also features Club Level Suites across the street.
La Playa: This is a lovely property located along the beach in Pelican Bay. 9891 Gulf Shore Drive. A short distance away, The Inn at Pelican Bay is also recommended.
Hotel Escalante: This is a charming, small boutique hotel that is located in Old Naples in close proximity to restaurants, shopping and the beach. The rates are higher from December to April, but are reduced and reasonable from May 1st to the end of September. They also have a restaurant, the Veranda, open for lunch and dinner. 290 Fifth Ave. South. I would definitely stay here on my next trip.
Edgewater Beach Hotel: At 1901 Gulf Shore Blvd.,near downtown, this hotel gets good reviews.