I'd create a class Hex and HexGrid, which would implement some kind of coordinates system. Also some supporting classes like HexPointer that converts mouse cursor position to a proper Hex coordinate, HexGridView which would render it and pass it to some kind of GUI class or something and probably some other. It highly depends on what I would want to do with such hex grid.
5870 + 250 = 6120 PLN. That's a LOT of money! Even my GPU was much cheaper and I can probably run even The Witcher /// on low/mid details. [hahah, I was just trolling, very funny...]