I'm assuming that by "PG", you mean you will be staying at Sabang Beach. 1,000/day would be a reasonable budget... Averaging 300-400 a meal (per person) is certainly going to keep you generally well fed even if you include a bottle or two of the local brew. A bottle of wine and/or imported drinks will quickly eat away at your budget.
On the other hand, there are vendors and small "local" hang-outs where you can get a meal for much cheaper. I can suggest a few places... Capt'n Gregg's (big portions!! Wash it down with a Gin Juice or two or three
), El Galleon (excellent food and arguably the best mashed potatoes on the beach... located on the quiet end of Sabang) Tamarind (also excellent food), Small Shot (very inexpensive... good for pancit and noodle soup), Syntrus (free shoulder and neck massage while you wait :cool2
, or the Deli (can't remember the name now, but it's next to Rock's Cafe and they make a good sandwich or hotdog for a quick lunch). There are also plenty of sidewalk vendors selling burgers, BBQ-meat-on-a-stick, and other snacks to hold you over.
Others might reply with some nasty experiences at the places I've mentioned, and even I have had some less than memorable meals at them. However, on the whole, I don't hesitate in recommending any of them.
Hope it helps...