15 or 30 year for a 35 year old investor just starting out.

[Nicholas Misch]

Hello BP Family,

I am 35 and am just wondering if I should be considering 15 or 30 year mortgages. I have a goal of 5 properties in the next 5 years minimum and then hope to expand more rapidly thereafter and want to ensure I am planning for my exits and retirement as well as my current income.  Any advice would be greatly appreciated. 

Nick