They (Dominican) usually charge per job. e.g. Call out, simple job will cost around RD$700 (US$21). Might take 2hrs, might take 2 mins
The country has no formal training system for these types of trades.
Nobody is licensed and the quality of electrical work is very low.
Most people learn by watching someone else, bad habits and techniques get duplicated over and over again. I cringe at some of the work I see here, rats nests held together with black PVC tape tape.
If your good and your based in Santo Domingo, I'm sure we could find you lots of work. You might even be able to earn a little more than the average Dominican sparky if your good