Tesla's first question is always the first question. Never, ever produce anything you cannot sell easily and locally.
How much farming experience have you, and in which countries? I have normally found when moving country that it is best to do just whatever the neighbours are doing for a couple of years, and then make a very small trial of a crop I know something about and that the local climate will allow to grow successfully if I want to diversify. Most of the neighbours will have been around for a long time. They produce what they do because the soil and climate suits it. Sometimes they do get it wrong (eg there are many neglected eucalyptus plantations in Portugal) but not normally with annual crops. They might make a mistake once, but they will not do it again.
Do you have any climatic info - winter and summer temperatures? Are there any permanent crops on the land, or do you know what has been grown in recent years. Is it all arable, or some grazing, any livestock? Any of this info would give a guide as to what might, but only might, be possible - provided you have the market.
Sopunds like an interesting challenge anyway.