here is a currency converter.
http://www.oanda.com/currency/converter/
as far as flights, there are so many sites out there in cyberland searching is easy.
if someone asks a specific question on flights many of us jump in and gives whatever info we can find.
there is a link re: properties for sale or rent in the catergory Where to Stay
and there is a sub category that has homes and condos for rent or sale. (not timeshares)
http://www.aruba.com/forum/f25/
and as far as residency requirements.......i will get back to you and will look at the DIMAS site.