If you go on the town side (pueblo) you can ask for Don Francisco (near the basketball courts) or Don Max (near the stairs to the left about 100m down from the docks) for a B$30 room. Doña Esperanza's hostel on the east-side tourist dock costs B$25, but you miss out on the interactions of being in the main community.

Solar power is usually available, but don't count on it.