However, I'm finding it difficult to increase my calls and consistently make 2-3 hours of calls a day while keeping my day job, and I need to be making more calls to get more deals as I find myself spending most of my time with follow up calls. 

This episode definitely becomes my confidence booster.  

I agree with this, but I do think you are better off getting them out as inherited tenants increase risk.

Do I concentrate on paying it down and increasing my credit score?

My lender says it makes sense to at least refinance even if I wasn’t cashing out to get rid of PMI and have increased tax benefits from the increased interest rate.

My wife is extremely risk averse so this slowly built her confidence in us leveraging my professional skill sets outside of the W2 for greater financial gain. 

But being that it's increased so much it's got us thinking... 

I've done a bit of rehab work over the last few years and am confident in basic fixes, but I would say my strength is that I am just tenacious and figure out ways to "make things work."

The tenant may withhold the difference between the old rent rate and the new increased rate.

It seems here in the Bay Area, it is starting to soften, DOM increasing, some sellers having to accept lower than listing price.