You can get into flipping houses without cash, but it's riskier and generally takes more work up front. Some ways to get started include partnering with an investor, getting a loan from a hard money lender or private lender, or even crowdfunding your first flip. If you've got a good relationship with your bank, you may also be able to approach them to see if they will fund your investment, though it's not likely they'll give you a loan if you have absolutely no money.