Many investor have this concern. As an Investor I believe there are always options available for us.
Here are some things that can be done:
One assumption, some cash (probably several thousands at least) will be needed!
You can buy property/ies using seller financing. Such homes can be found over the internet in site like www.craigslist.com and use “owner” or “seller financing” as search term.
Buy cheap(er) properties for cash. Some of the condos we are seeing in Phoenix and in Orlando as as low as $20K.
Use hard money. This will probably be good as a short-term solution due to normally high interest rates.
Important: Buyer be aware! make sure you are doing the transaction safely and conducting all required due-diligence.