Hi Dave,
Santiago from Colombia here. I've been talking with Rene lately and have notice the interest in creating a community, the distance between our farms is about 65km (2 hours away or a little bit less), although I haven't met Rene I think it's cool that we can support each other, I know they are more permaculture people in Colombia and maybe in our region (I have some neighbors that have an incredible farm 60km form Rene and 30km from me).
If what you want is like minded people you can certainly find them here; the other advantage is the versatility Colombia has, I don't know if people are aware of the altitude differences in Colombia, for example Renes farm is about 1000 meters higher, we are 350 mt from sea level, and Bogota 2600 mt from sea level is 3 hours away, so basically you can choose the type of climate you want, from hot to cold (all year round) since you are in the tropics.
I've lived in Argentina so I can confidently tell you labor here is cheaper if you want to hire some one for a hand.
If you want to buy now is the time since the dolar is quite high right now.
I't can sound as over selling Colombia, in my defense I love my country and I believe it needs as many permies as posible jejejeje
If you have questions let me know
Cheers for Colombia!!!