Absolutely. (although the + and - suggest you have an open budget??)
Java is probably the most expensive, but you can get accom for approx $12night if you're happy to forego aircon and a private bathroom. In other places, you can manage quite easily on 25Euro a day.
try www.agoda.com and search for 1 star hotels - range from US$9 ++ per night.
Meals - budget US$4 per person per meal
Transport might get you out a bit - but not expensive
Beer is cheap - wine is not.
Wifi is available free in most cafes and hotels/hostels.
Hope this helps? about 6 years ago