For other people's reference:
Misima has only one guesthouse. It is located on the main toad in bwagaoia. It is called misima guesthouse and is run by a man called keith. it has basic facilities - shared unisex bathrooms with no hot water, aircon, meals (which are expensive - dinner k50, lunch k20, breakfast k35), and a bar. It gets a bit rowdy at nights in the bar. they wash your clothes for free. it is currently k200/pn. this is the last number i had for it +675 6437443
Currently there is a kaibar down at the wharf next to the market run by a woman called Mary who can provide good lunches and dinner for between k5 and k10.