Buying a rental property with no money down is a challenging task but not entirely impossible. Here are some strategies you can consider:

1. Seller Financing: Look for sellers who are willing to finance part or all of the purchase price. With seller financing, you negotiate terms directly with the seller, which might involve making a down payment, but it can be significantly lower than traditional financing options.

2. Real Estate Wholesaling: In real estate wholesaling, you find properties at a discount and then sell them to investors for a fee. This strategy requires no money down since you’re not purchasing the property yourself but rather assigning the contract to another buyer for a fee.

3. Joint Ventures or Partnerships: Partnering with someone who has the capital but lacks the time or expertise to find and manage rental properties can be mutually beneficial. You might bring your knowledge of real estate and property management to the table while your partner provides the funding.

4. Private Money Lenders: Private money lenders are individuals or companies that lend money to real estate investors. Unlike traditional banks, they may be more flexible with their lending criteria and may require less money down or even offer 100% financing.

5. Government Programs: Investigate government-backed programs such as VA loans (for military veterans), USDA loans (for rural properties), or FHA loans (with low down payment requirements). These programs often offer favorable terms for first-time homebuyers or investors.

6. Home Equity: If you own a property with equity, you could leverage that equity to finance the purchase of another property. This can be done through a home equity loan or a home equity line of credit (HELOC).

7. Lease Options or Rent-to-Own: With a lease option or rent-to-own agreement, you negotiate the option to buy the property at a later date for a predetermined price. You pay rent in the meantime, and a portion of your rent payments may go toward the down payment when you exercise your option to buy.

8. Creative Financing: Explore creative financing options such as subject-to deals (where you take over the existing mortgage payments), assuming existing loans, or using seller concessions to cover closing costs.

9. Hard Money Lenders: Hard money lenders offer short-term loans secured by real estate. While interest rates are typically higher than traditional loans, they may finance the entire purchase price plus renovation costs, allowing you to acquire a property with little to no money down.

Remember, whichever strategy you choose, it’s crucial to conduct thorough due diligence, understand the risks involved, and consult with legal and financial professionals to ensure compliance with regulations and to protect your interests.