This is super easy. Just go to York Town and go to the beach that is south of the Horse Stables. Then kill the pirates and collect 75 of the eyepatches. Then go to the guard in green and you get 1000 gralats. Sadly, you can only do this once a day.
Buy a house with grass and prepare to farm for Gralats (in-game currency) by going to the Belle Isle Garden Shop and purchase some fences that will cover the front part of the farm. Align the fences, buy bombs and throw them into the grass. Do NOT collect the Gralats when the appear. Instead, let them stay there and keep throwing bombs at them. They will soon stack in value and turn into other colours.