What would you do with this investment?

[Jesse Fernandez]

hi Bp folks, 

I posted Something similar on another section, but with those that have experience in REI I would looooove to see how you would proceed with my current situation:

Backstory: 

1) 2011 - purchased a 2 family in up and coming Queens, NY area for $280K with only 3.5% down using a FHA loan ( first time home buyer).

I've used it as my primary the first 6 years. 

The property has a net income cash flow of $525/mo after all expense, mortgage, etc. 

Current value $610k, remaining mortgage $238k. 

Note: I think this is a really hot area which will continue to grow given the proximity to Brooklyn, which has exploded the last few years. 

2) bought my new primary 1 family forclosure home for $325 in 2016 and house hacked it to get some supplemental income, which covers ~50% of my mortgage. New value is $400k

With that laid out, what would you guys do next? My goal is to increase rental income so that I can hopefully retire in 5-10 years. I know I have a lot of equity in my first home, but I am also reluctant to sell knowing that it can continue to increase in value and also the nice income stream. But happy to hear realistic way a to leverage one or both properties. 

Thanks all