Hello Joe (finally a name! not just JCP"enny")
I can see and imagine that most of our forum members are shaking their heads now from disbelief.... You gone down to Medellin, Colombia trying to import coffee directly from coffee farms without knowing any of these are just "courageous" to say the least. By the way, you know... Medellin is not the right place to find a good coffee farm in Colombia, right? I have been to Medellin few times for other business, but it is not the right place for coffee farming. they might have few, but again, not the best place.
Anyway, it is 4am in China and I got couple of hours to kill before I leave to Airport, so "WHY NOT". I am going to give you some more info...
1. what type of coffee : I am not talking about Robusta or Arabica. You are NOT going to buy Robusta. you will buy Arabica, but in Arabica, there are hundreds of different types of coffee.
https://en.wikipedia.org/wiki/List_of_coffee_varieties
2. import only Green coffee : yes, you can ONLY import green coffee, not parchment, nor roasted coffee. Just Green coffee.
3. Cupping : Coffee is Food. so just like buying fish, apple, nuts, bread..etc, you have to "taste" to make it sure that they are good. and what you tasted and chose in Colombia will be same as when you receive in USA. So, when you "cup" (taste) your sample coffee from coffee farm, (apparently since you can not "cup", you have to find someone or hire someone to cup it for you), you are setting the quality standard for exportation. Again, this is very complicated process and even if I explain here, you will not understand. you have to AT LEAST STUDY via internet and understand what it is and what it does.
https://en.wikipedia.org/wiki/Coffee_cupping
4. Most farms AROUND THE WORLD does not have MILLING MACHINE. Milling means taking "parchment" out of green coffee bean and also sorting & polishing the beans before export. Same for "sun dry green coffee". this means after eliminating cherry from parchment, then, you need to dry the parchment on farm's patio until it has 10 to 11% moisture level. Then, it goes to milling factory.
https://en.wikipedia.org/wiki/Coffee_production
Joe, to say frankly, it takes years of experience to become coffee buyer. and I will NEVER be able to explain to you via coffee forum and you will not understand right now. But if you continue to study and pursue this industry, I must say that it is quite interesting and satisfying business, specially working with farmers and workers (in my case).
However, since you are in Medellin, go around and meet some coffee people and visit some farms...etc. I do not know how long you are planning to stay, but keep your eyes and ears open and try to take in as much as you can. That is all I can say.
No matter what it will be a great experience and adventure for you. BTW, as we all know, Venezuela & Colombia has most beautiful girls in the world. And since Venezuela is all screwed up now, only Colombia is the place for visit. And in Colombia, Medellin is THE PLACE for the most beautiful girls. Food is awesome and of course, coffee. in every corner, you will find Juan Valdez coffee logos and small coffee vendors. NOT a bad place for a cup of coffee, but not the greatest either. it is just marketing of Colombia coffee.