Ways to fund a downpayment on a $475,000 rental?

[Steve S.]

Other than writing a 25% check, what options am I not thinking of?

I own 2 other rentals but only have 30% equity in each of those. 

Are there other loan options beyond a 30 year conventional mortgage I'm not thinking of that may be able to reduce down payment from the typical 20-25% amount?