Thanks again to readers JS and T for keeping me updated on this. Look up the history of this plane and others at FlightAware.
UPDATING: it looks like the flight plan was filed a day early. The plane will go to Brownsville today, according to a newly filed flight plan.
Responding to the comment that “why” is the important issue here, all I can say is yes, of course. But the real “why” may never be known. Starting an airline is an odd thing to do with one’s money. I am starting to think it’s an apt coincidence that Arevenca is in the old Stanford Bank offices in Oranjestad.