Cheapest way is a pelet gun from Walmart, like a daisy powerline 880 they are like $30 or you can get a higher end one so you can shoot further. If they are starlings they are more than likely an invasive species in your area and you will be helping the environment more by shooting them, In my area the babies have just came out of the nests a week ago, if you shoot the parent the babies are too stupid to go elsewhere on their own and you can just pick them off. If the netting works it sounds like you won't have this problem anymore.