Hey There - I have never heard of this place, but if you try to Maison Gautreaux, they have rooms for $30 USD per night which does include tax! - Sounds to me like a really nice place. I have heard great things about this place and YES, I am planning a 14 day trip to Santo Domingo on the 16th of April and will be staying there for the duration.
Here is the website - Give it a look and if it works out, I certainly hope that you will post a trip report back on this site when you return. Please ensure that if this go good or bad, you let me know. Thanks and good luck
Maison Gautreaux - Santo Domingo, Dominican Republic Youth Hostels
Hotel Maison Gautreaux... En Santo Domingo, Algo Distinto.