Creative Ways to Grow My Buy and Hold Portfolio?

[Paul Camuto]

I currently personally own and manage 15 investment condos. I have purchased each unit 1 at a time using a portfolio lender and line of credit funds for the 20% down. These properties have been in central NJ for about 150K. Each property typically has a cash flow of 300 a month or more. Outside of continuing the process of using my own 30-40K down @ 5-6% are there any other alternatives to acquiring the properties without the outlay of cash on my own? What would a syndication company look for in terms of return?