Hi Shawn,
Why don't you set one up, don't have to be a big one but then again your land is so big...
Since there's a few EC green house already up and running in Thailand, I think it would be easier to source for parts and expertise required to get it setup in Thailand. FYI, EC is not somrthing new, it's been used in enclosed chicken and pig farm all over the world, so parts sourcing shouldn't be a big problem. It would be great if we can get some feedback on the real world performance, maintainence and monthly cost so we can better understand whether it'll be cost effective to get such setup in tropical countries.
About drip irrigation, what kind of system did you use? Maybe can start a new thread on this topic for all of us to learn? Thanks.