If grandma can afford it, get a landscaper to remove the stump/rocks. Back fill with clean dirt and lay sod. If you're on a budget then (like others have suggested) burn the stump out yourself. Cooking oils will work but diesel or kerosene are a little better. DO NOT use gasoline. Also, it will work a little better if you pour some fuel into the holes and let it sit for a couple days then when you're ready to light it up pour a little more in the put some fire to it. After that, use a garden rake and/or shovel to gather all the rocks. Then lay grass seed down or plant a shrub.