You could try to tap into the equity by doing a line of credit or worst case refi if you wanted to buy another. 

Do your same background and credit checks and other requirements that you do with every other applicant. 

I would focus on screening your tenants for background, credit, and income to try to avoid an eviction and excessive damage to your property to minimize your turnover expenses and vacancy loss.  

We moved into our studio ADU and rented out the main house, worked our tails off to pay off credit card debt, refinanced and now live in the main house and rent out the ADU where the tenant is paying more than the interest on our loan.

Credit.

While I wasn't able to do the most recent bootcamp, I did get the home study course for both MHP and RVP. 

I know that I could save some money by continuing to manage the property on my own, however, I have concerns about being out of state and not having eyes on the state of the home (leaks, damages, etc.) and of course, parties.

I have a solid amount of capital to invest and am looking to invest remotely in the Midwest or South in places that will provide a net income and, of course, ideally also provide at least a minimal amount of appreciation, but I'm definitely leaning more toward the cash flow model given that I'm an older investor. 

The majority of taxpayers are required to settle their tax dues by April 18 to avoid penalties and interest accruing on any outstanding amounts after this date.For those residing in Maine and Massachusetts, the deadline is extended to April 19 due to the Patriots' Day holiday in these states.How to Request an ExtensionIf you find yourself in need of an extension, the IRS provides convenient options to make the process smoother:File Form 4868:Utilize your tax professional, tax software, or the IRS Free File platform on IRS.gov to submit Form 4868.Individual taxpayers, regardless of income, can leverage Free File for an automatic extension request.Electronic Payment Method:Make an electronic payment using Direct Pay, Electronic Federal Tax Payment System, or debit/credit card or digital wallet.When selecting the payment type, indicate it's for an extension.

When banks check your refi eligibility, they eyeball your credit score, income, and the property's value.