As suggested, ask motoconchos for cheap hotels. If you speak spanish, should be easy. In Romana (and usually everywhere) anything below 500 pesos is cheap. Usually 500-pesos rooms outside of big cities (Santiago, Santo Domingo) and expensive cities (Bavaro, Sosua, Cabarete, Puerto Plata, Romana) are decent ones, with A/C, cieling fan, private bath (often with warm (not hot) water) and cable TV. Non-AC rooms are about 100 pesos less, as a rule of thumb, everywhere. Not a 100% rule, but most often then not. So if you don't need AC, ask for a room with a fan only and usually you can save couple of pesos.