If you do not know anything about setting up an old age home, why are you even attempting this?
The first thing you need to do is get a job in an old age home and learn the business. While you are doing that you need to save enough money to establish your business and enough money to finance your living expenses for at least 2 years till the business starts to make money.
You will also need to learn how to research and write a business plan to establish such a business. That will include finding out who your competition will be, whether there is a market for another business if there are similar businesses where you want to establish yours, what your point of difference will be, how you will market your business etc.
As you can see, starting a business is not something you do on a whim. As so many other members here on CiteHR have found out the hard way, failure to plan is planning to fail.
As an aside, your question has no relevance to this forum. We exist to discuss HR problems.