In Reply to: Looking for kost for rent posted by kimber99my on Thursday, 20. May 2010 at 11:43 Bali Time:
Volunteer organisations/places will provide you with accommodation or have it already set up
eg
"The only cost you need to pay is to cover your board while staying at the home. This is a minimal fee of just £4 (50.000rp) per night and this this will pay for your electricity, water and food each day."
http://seedsofhope.childrenofbali.org/volunteering-information-at-seeds-of-hope-orphanage/volunteer-fees-and-costs/
or:
http://seedsofhope.childrenofbali.org/volunteering-information-at-seeds-of-hope-orphanage/hotel-and-orphanage-accomodation/
An applicable visa is also needed for volunteer work.
If you still need a kost then perhaps ask the orphanage you are volunteering at for contacts near by.