Sell or rent current house?

[Tim O'Brien]

Hi all,  

My situation: looking to move into a bigger house in hopes of family getting bigger. I currently live in a 1/1 sfh that I own. I bought in 2010 and have approximately $100,000 equity, and ow $118k. I think I can rent this house out for approx $1300-1650. mortgage payment is $715 PITI. I live in Denver. the house is ~100+ years old.

My question: how do I analyze if I should sell this house when I find something new, versus rent?  I would like to accumulate some rental properties over time, but RE investing is not my primary source of income.  

I'm sure more info is needed.  I'm just not sure what all I look at and what assumptions I can make.  thanks for any help.