A question about investing in land?

I really don't know how to invest in land. My mind is fixated at trading that's why I'm basically blank when it comes to this area. Well, anyway, a relative of ours is not interested in owing a piece of land somewhere in Bicol simply because he's getting old and none of his two sons would want to manage it since they're living in the US right now and they don't plan to come back here in the Philippines. He's really encouraging my mom to buy his land which has a total land area of 4 hectares. The land is being utilized for rice production. I really don't have an idea whether he's earning from it or not. All I know is he wants to dispose it as soon as possible. Um, I have a problem with this since my mom and I are too busy with our business here in QC but my mom said she will go there in Bicol next year after she finally scores a huge deal with a garments factory somewhere in Cavite. My mom also said it's better if we will change it from a rice plantation to a bus terminal and banana plantation. ??? I don't have a background when it comes to this and neither does my mom. Do you have a piece of advice for me? I just want to be sure we're gonna make the right and wise decision. Thanks!