Also, Is it safe to say (after searching and researching) that for 340 Pesos a day , or less,I can eat pretty good?
Yes you can.
If you eat out
Breakfast: 100 RDP (breakfast of mangu, eggs, fried salami or ham)
Lunch: 150 RDP (chicken/beef/pork + rice/potatoes, green salad)
Dinner: 100 RDP (pica pollo (fried chicken), chimi, BBQ chicken, etc.)
You can even save more if you cook some of your meals, especially breakfast.
E.g.
Breakfast: 3 eggs, 1/8 pund cheese, tomatoe, onion, for an omelette - about 50 pesos.
Lunch: 1 pound rice, 1/2 pound meat (averaged), salad and all necessary ingredients about 80-90 pesos.
Dinner: 2 platanos, 1 pound salami, onion, other ingredients - 70 pesos.
Also, fast food dinner - small picapollo (2 pcs) is 70 pesos, chimi de pierna is 60 pesos, 2pcs BBQ chicken with yuka is about 80 pesos, etc.
You certainly can survive (mealwise) on 10,000 pesos per month, between cooking yourself and buying some take-away food. You can have a varied diet, believe me. What you will probably not see much is shrimps, etc., but you can kick in some fish here and there.
Things to remember:
Buy food in "almacenes" they sell cheaper than supermarkets. usually sell non-perishable foods.
Buy meat at mercado, but sometimes supermarkets have cheaper prices.
Shop around and learn what and where is cheaper.
Look up posts by Rick Snyder. May he RIP. He lived in El Seybo and was a very valued member of DR1 and he DID NOT live on a lot of money. Many DR1ers, especially new ones, have forgotten that. He is an example of how it is possible to make it.
Also, you may consider spending some 15-20.000 RDP on a used motorbike or pasola, especially if you will live in a smaller city or suburs, so to make your transportation easier.