Almost all visitors choose to stay in Kilwa Masoko there is no accommodation on Kilwa Kisiwani, there are a couple of budget options in Kilwa Kivinji all the options below are in Kilwa Masoko.
Budget prices in TSH
Mikumi guesthouse
About the cheapest place in town, rooms are spacious but a little grubby though not unclean. It has electricity some of the time and technically it has running water, although since there is only one tap for the entire guest house i'm not sure if this counts. Facilities are shared, and showers involve using a bucket.
New Jika Guest House
This is the main local read cheap place in town. It's in the center of town and recommended for people not wanting to pay tourist prices. Rooms are clean and some have AC. Best to avoid the restaurant, there are many better places around town.
Up Market all prices in USD
M: +255-0-784-624-664 Prices are by room based on occupancy: room with 1 person is $100 w/ full board, room with 4 people is $190 w/full board, therefore a good choice for families!
Mostly caters to sport fishermen from Europe and South Africa. Rooms are very simple, food very basic, bar is well stocked. Not the most inviting family spot.Prices are per person, per day, $80 for a "fishing banda" and $100 for "beachfront banda"