current approximate cost/profit breakdown on keeping such an endeavor going.
Our property was a Rice field. We sectioned off one hectare, and built on it. We currently have 3 hectares in Rice this year.
1.) For us, the largest determinant of costs was the quality of the person farming it. Ours was piss poor, so the return was likewise. He believed that his job was to skim and scam off of us instead of grow a crop.
2.) You can make money at Rice, but it is very thin and "timing" dependent. Timing being driven by the rains. Transplant too early or late and your paying for lots of irrigation.
So all in all I'd say that unless you had a trusted family member, who was an experienced rice farmer doing it for you. It would almost be impossible to profit at it remotely.
As for developing it ..... well I've heard that they are cracking down on that. Starting to really enforce all the building regs on the books. The bureaucracy of which make building in the states look like a walk in the park.
We never had too many problems .... but ..... Now a days if we build something code enforcement and taxation show up a few days later with printouts from Google Earth to investigate.
Good luck.