If you would start around 3 piglets and you will rent a land i would not recommend that you continue your business.
You will only earn big in swine by means of volume. If you start small and will rent a land then the profit you would gain from selling your produce would just be enough for the rental of the land.
Better engage in paiwi system if you cannot personally manage your piggery or if you do not have land.
In the paiwi system your partner will provide the housing, labor and electricity while you will provide the pig, feeds and medicine. And at the day of harvest/slaughter what ever profit you will have will be divided. If you incur loss then losses will also be divided.
Sorry for the late response.