Success in the Pacific Northwest and questions

[Kirill Chervets]

First of all I want to thank Biggerpockets for an awesome site and tons and tons of information that has helped me succeed. Wouldn't have been able to do this without you guys.

Here is a little back story, I purchased my first townhouse in 2011 in the city of Mill Creek, Wa for 110k and have been renting it since producing great cash flow. It now is worth 275k all day.

In 2013 I bought a home in Bothell, Wa for 150k and now worth 240k also rented and producing great cash flow.

My latest purchase is a duplex in Everett, Wa purchased for 243k with 10k into it for maintenance and repairs. Rented for 1240 and living in the other side for free.

I feel like Snohomish County is now overpriced and at 2006 levels. My question is whether I should sell all three properties, net around 300k and reinvest it as the properties values are no longer in line with the rents or just continue to allow tenants to pay off properties and keep saving more money. I don't make very much at my day job and it takes a while to save money for down payments. My goal is to build enough passive income to not have to work until 60. I am 27 years old now with a bachelors degree and no debt outside of real estate. Can someone local please help or offer suggestions? Feel free to ask other questions that would help clear up the situation. Thank you!