Alex, follow your gut feelings. Most of the ones trying to deceive you have never owned anything on their life nevertheless in the DR. They are a bunch of clueless/afraid of making a decision themselves thus their provided thoughts.
The "maintenance" will be exactly as you stated "condo maintenance fees" to cover for the most part what you have already pointed out; gas, water, cleanup, security and cable tv at some places. The amount of these fees would vary depending on the "junta" of neighbors living in the building.
Your/building location tells me that you do live with very successful Dominicans thus your junta should be very strong. You have lived in the DR enough to make a decision, do not allow scary thoughts to steer you away from something you know feels right within you.
I purchase and sold when it was time also in SDQ, not a problem at all with anything, not with maintenance, junta, neighbors, nada, nothing. Again, most of these folks have never outright owned anything and will suggest to stay at a B&B for ever.
Is your decision, I don't sell real estate and do not live at the DR any longer although do travel very often - good luck and stay thirsty my friend!