Now it is possible to start business without money! it is real.

As JGabriel mentioned, you may want to visit with a counselor at a small
business development center or a SCORE office in your area. They can help you
do the research for your business plan. The start up costs will depend on
such things as whether you can rent or purchase an already established
restaurant space or whether you will need to build or remodel. Restaurants
are very expensive to start and they are subject to numerous regulations, so
be sure to do thorough research before committing to anything.

It would depend on the necessary factors that you will be needing to start
your business as well as how much budget you have at hand.

You should start researching first about your business needs, look on how
much you will need that will also depend on your business plan.

If you haven’t already, check out this article on estimating startup costs. You may also try getting in touch with a local Small Business Development Center or SCORE, two of SBA's resource partners. They're located across the country and provide free business counseling and answers. Visit our local assistance guide to find your local SBA resource partners by entering your zip code. One approach that may be useful is talking to a mentor who could offer you specific guidance. Good luck!