Bali is unbelievably cheap. I stayed in a family compound in Central Ubud for $3/night, breakfast incuded. Cool shower only. Probably not for your folks, but a little Net searching (or talking to travel agents after arrival) or bidding on Priceline should get a lovely place with a pool for less than $40-50 a night, breakfast included. Ubud is an excellent place to stay for a week or so. Be sure to see the temple dances which are really worthwhile. There is a different one every night. Keep in mind that Ubud is not near the coast.