A friend of mine has a bit of an obsession for market gardening, he's no land or farm background but is taking time out now from work to travel Europe and see how they do it there, with the intention of going at it himself.
He has done courses in it and spent time with some fella in Limerick I think who rents 5 acres and turning over 75k a year or thereabouts allegedly.
Polytunnels and that type setup.
Labour intensive I expect, not a big machinery type setup.
He reckons with more focus on health and knowing food origins etc. there is market there.