Loan Terms and Cash Flow

[William A.]

The strategy I am thinking about implementing is to buy rental properties,  and then utilize the cash flow to buy additional properties.    Is there any reason I would want any other loan term rather than a 30 year fixed rate?   I have read real estate investment books that talk about paying down the principle as fast as possible.  This seems counter-productive to me,  as it seems the cash flow would be better utilized as leverage for additional properties.   Am I missing something here?