To sell or not to sell, that is the question

[Account Closed]

Hey guys, first time poster here.

I have a house that was my primary residence that I moved out of about 2 years ago. My plan was to sell it before 3 years to avoid capital gains taxes. I have been renting it out during this time, and the current rent is $3200/month. The house is fully paid for, and don't have a mortgage. I bought it for $500K initially, and I could probably sell it for $800K this next year. (It's been a super hot market here in Salt Lake City the last few years.) 

I'm now thinking of keeping it as a long term rental instead, but I'm having a tough time deciding. After looking at what I might pay in capital gains taxes and depreciation recapture taxes, when I do sell it in the future, I'm not totally sold it's worth hanging on to it. 

If I do keep it, I've thought about doing a cash out refinance to get some of the equity to buy a couple more properties, and remodel my current primary residence. 

I do also have two other SFH rentals as well already.

So, better to sell now and avoid capitals gains, or hang on to it as a long term rental, and pay taxes later?

Any thoughts would be appreciated.