"I believe most guys can find a very nice hotel in Barranquilla for a LOT LESS than the $180 a night Jamie wants to charge if your information is correct"
I got the information of the website. Actually if you don´t book in advance (I think well in advance) the charge per night is $200.00 US or $380.000 pesos. As I understand it you don´t have the option of paying "a lot less" because in order to use the introducion service you must stay in their lodgings and pay those rates. Does seem a little pricey since for example a Luxury King Suite with Jacuzzi at the Hotel Spiwak at Chipichape mall in Cali, the brand new 5 star rated hotel runs $110.00 US ($209.000 pesos).
Yes $3500 would be about right for the three day stay covering meals, taxis and other incidentals for yourself, your dates and your translator.