Frankly after the power outages last year everyone geared up with a very expensive gensets which have now been sitting idle ever since.
If I was you I'd advertise to take someone's off their hands - make sure it's a diesel as the petrol ones are not geared for constant use but only as a stopgap measure and most say must be turned off after 2/3 hours usage for 1 hour or somesuch.
On the same front, the Chinese have gotten into solar panel production in a big way and knocked the stuffing out of the stupid prices that were being asked - so much so that the US and Europe are contemplating some silly protectionist taxing on them.
This could mean a short term massive drop in the prices, but whether that makes its way through to us in Bali is another question.
That would be the way to go for a long term solution to any energy issues here in the tropics.