I've
written about these places extensively, but I haven't been back in about 4 years so my info may be out of date. Bottom line is that Dominican girls don't do much for me generally, so while a lot of fun can be had it isn't my cup of tea.
All inclusive places are expensive. You are looking at $500-$800 per day for the ones with Dominican girls and way more for ones who fly in escorts from Europe or South America. The advantage is that everything is taken care of for you. You don't need any Spanish, and you have a fun relaxing time on a great beach with a 24-hour escort. No worries at all, besides the wallet.
Blackbeards is a good alternative, cost-wise. It isn't all-inclusive, but that means you just pay for what you want. Independent escorts charge from a menu of fixed prices. Meals and drinks are not included in the room rate. If you drink a lot (or buy drinks for the girls) you can rack up a big tab, but otherwise you will save a lot of money. The other problem with Blackbeard's is the location. It is not near any touristy areas, so you are cabbing it whenever you go out. It's not a luxury beach resort, but if you are just there for the boning that's no big deal.
If you speak Spanish or just generally have good sense you can save a LOT of money by just getting your own room on the beach and finding your own girls at the clubs and bars along the strip in Puerto Plata or Sosua. Even paying gringo prices you can do $50 for an hour or $100 for toda la noche.
Costa Rica is great. Once you take hotel and flight into account you don't save much for a short trip, but at least there is a lot of touristy things to do. There is also a lot of variety in CR, as girls from all over go there for work.